Chip device and method for manufacturing the same

Abstract

The present invention provides a sheet-like device suitable for soft electrical products that are strong, highly flexible, and operate stably. The sheet-like device (5) comprises: a first portion (L1) where a first film layer (40), a first conversion portion (61), and a second film layer (50) overlap, a second portion (L2) where the first film layer (40) does not exist and the second film layer (50) exists, and a third portion (L3) where the first film layer (40), the second conversion portion (62), and the second film layer (50) overlap. The first portion (L1), the second portion (L2), and the third portion (L3) are arranged in sequence in a first direction (D1). The first region (R1) including the first portion (L1), the second portion (L2), and the third portion (L3) has an elongation per unit length at 20°C when the same force is applied in the first direction that is greater than the elongation per unit length of the first film layer (40) alone.

Description

Technical Field

[0001] The invention relates to a sheet-shaped device with a film layer whose main material is a thermoplastic elastomer and a manufacturing method thereof. Background Art

[0002] In recent years, wearable electrical products have been actively developed as wearable devices worn on the body. Wearable electrical products require flexibility. For example, there are electrical products that have blood pressure measurement functions and / or pulse measurement functions assembled on wristbands (bracelets), and there are electrical products that have mobile phone terminals assembled on gloves as described in Patent Document 1.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2006-165892

[0006] As described in Patent Document 1, when a wearable electrical product is assembled in a glove, a component that is strong and operates stably in accordance with the complex and violent movements of the glove is required. Strong components refer to components that are unlikely to fail when worn, but for example, components that are subjected to many bends, components that are subjected to large stresses, or components that are highly waterproof. The required strength varies depending on the application. In addition, stable operation refers to, for example, stable conversion of physical quantities and electrical quantities of sensors, stability of light emission of light-emitting elements, stability of heat generation of heaters, and stable conversion of current and radio waves of antennas.

[0007] The gloves described in Patent Document 1 are excellent in function, but when the drawings of the gloves are observed, the gloves lack flexibility and feel poor to wear because electrical functions are incorporated. In addition, for example, when a touch sensor is incorporated into the gloves, if it is a touch sensor that converts electrostatic capacitance into electrical quantity, the change in electrostatic capacitance caused by the deformation of the gloves may sometimes become an error. Summary of the invention

[0008] An object of the present invention is to provide a sheet-like device suitable for a flexible electrical product that is strong, highly flexible, and operates stably.

[0009] Hereinafter, a plurality of modes will be described as means for solving the problems. These modes can be arbitrarily combined as needed.

[0010] A sheet-like device according to one aspect comprises: a first film layer, the first film layer having a thermoplastic resin as a main material; a second film layer, the second film layer being bonded to the first film layer, the second film layer being mainly made of a thermoplastic elastomer that is more elongated than the thermoplastic resin, and having a greater elongation per unit length at 20°C than the first film layer; and a circuit layer, the circuit layer having a first conversion portion having a first conversion function and a second conversion portion having a second conversion function, and being bonded to the first film layer. The sheet-like device comprises a first portion where the first film layer, the first conversion portion, and the second film layer overlap, a second portion where the first film layer does not exist and the second film layer exists, and a third portion where the first film layer, the second conversion portion, and the second film layer overlap. The first portion, the second portion, and the third portion of the sheet-like device are arranged in sequence in a first direction within the surface of the second film layer. In the sheet-like device, a first region including the first portion, the second portion, and the third portion is configured such that the elongation per unit length at 20°C when the same force is applied in the first direction is greater than the elongation per unit length of the first film layer alone.

[0011] Since the elongation of the first film layer of the sheet-like device thus constructed is smaller than that of the second film layer, by bonding the circuit layer on the first film layer, the first conversion function and the second conversion function of the circuit layer are better protected by the first film layer, and the first conversion part and the second conversion part operate stably, compared with the case where the circuit layer is directly formed on the second film layer. In addition, since the stress applied to the first film layer is relieved by the thermoplastic elastomer in the second part where the first film layer does not exist but the second film layer exists, the circuit layer bonded to the first film layer is protected. Furthermore, by configuring the elongation of the first region to be greater than the elongation of the first film layer alone, the sheet-like device can be flexibly deformed in accordance with the deformation of the surroundings, compared with the case where the elongation of the first region is equal to the elongation of the first film layer alone. As a result, for example, when the sheet-like device is applied to clothing, the wearing feel of the clothing becomes better.

[0012] In the above-mentioned sheet-like device, the circuit layer has a third conversion part having a third conversion function, the sheet-like device has a fourth part where the first film layer does not exist but the second film layer exists, and a fifth part where the first film layer, the third conversion part and the second film layer overlap, in which the first part, the fourth part and the fifth part are arranged in sequence in a second direction different from the first direction in the plane of the second film layer, and the elongation per unit length of the second region including the first part, the fourth part and the fifth part when the same force is applied along the second direction is greater than the elongation per unit length of the first film layer alone. The sheet-like device thus constructed can improve the stability of the first to third conversion functions and improve flexibility not only in the first direction but also in the second direction.

[0013] In the above-mentioned sheet-like device, the second portion may have substantially the same thickness as the first portion and the third portion. Since the sheet-like device thus constructed has no steps at the boundaries between the first portion and the third portion and the second portion, stress due to jamming at these boundaries is prevented and the device is not easily damaged.

[0014] The sheet-like device may also be configured to include a decorative layer bonded to the second film layer and displaying a pattern. In the sheet-like device configured in this way, the positional relationship between the pattern of the decorative layer and the first conversion part and the second conversion part is fixed. As a result, for example, when the sheet-like device is applied to clothing, even if the sheet-like device is deformed due to body movement, the arrangement positions of the first conversion part and the second conversion part can be accurately determined by the decorative layer.

[0015] A method for manufacturing a sheet-like device according to one aspect comprises the following steps: a step of bonding a circuit layer having a first conversion portion having a first conversion function and a second conversion portion having a second conversion function to a first film layer having a thermoplastic resin as a main material to form a circuit film; a step of forming an elastomeric film having a second film layer having a thermoplastic elastomer as a main material that is more elongated than the thermoplastic resin and more elongated than the first film layer at 20° C. and a protective film; a step of overlapping the circuit film and the elastomeric film and performing heat pressing; and a step of peeling off the protective film. In the step of performing heat pressing in the method for manufacturing a sheet-like device, a mold is pressed against the second film layer via the protective film, and while forming a concavo-convex surface of the second film layer, the first film layer and the second film layer are bonded, and a first portion where the first film layer, the first conversion portion and the second film layer overlap, a third portion where the first film layer, the second conversion portion and the second film layer overlap, and a second portion where the first film layer does not exist but the second film layer exists are arranged in the order of the first portion, the second portion and the third portion in a first direction within the surface of the second film layer.

[0016] In the sheet-like device manufactured by the manufacturing method of the sheet-like device thus constructed, since the elongation of the first film layer is smaller than that of the second film layer, by bonding the circuit layer on the first film layer, the first conversion function and the second conversion function of the circuit layer are better protected by the first film layer and operate stably compared with the case where the circuit layer is formed on the second film layer. In addition, since the stress applied to the first film layer is relieved by the thermoplastic elastomer in the second part where the first film layer does not exist and the second film layer exists, the circuit layer bonded to the first film layer is protected and operates stably. Furthermore, by configuring the elongation of the first region to be greater than the elongation per unit length of the monomer of the first film layer, compared with the case where only the elongation per unit length equal to the elongation per unit length of the monomer of the first film layer is obtained, for example, when the sheet-like device is applied to clothing, the flexibility is improved and the sheet-like device is better adapted to the movement of the human body. As a result, for example, when the sheet-like device is applied to clothing, the wearing feeling when wearing clothing containing the sheet-like device becomes better. In addition, since the concave and convex are formed on the second film layer in a state protected by the protective film, the degradation of the surface of the sheet-like device can be prevented. In such a method for manufacturing a sheet device, the number of steps in the manufacturing process can be reduced compared to the case where the projections and recesses are formed on the surface of the sheet device in a step different from the step of heat pressing the surface of the sheet device.

[0017] The manufacturing method of the sheet device can also be configured to include a step of forming a decorative layer showing a pattern between the protective film and the second film layer. In the manufacturing method of the sheet device configured in this way, the configuration positions of the first conversion part and the second conversion part can be easily aligned with the configuration position of the pattern.

[0018] Effects of the Invention

[0019] When the sheet-like device of the present invention is applied to a flexible electrical product, it helps to improve the firmness, flexibility and stability of the electrical product. The method for manufacturing the sheet-like device of the present invention is suitable for manufacturing a sheet-like device to be decorated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a perspective view of a wristband to which the sheet device according to the first embodiment is applied.

[0021] Figure 2 This is a perspective view of a wristband to which the sheet device according to the first embodiment is applied.

[0022] Figure 3 This is a partial enlarged top view of a portion of the sheet-like device.

[0023] Figure 4 It means along Figure 3 A partial cross-sectional view of the cross section of a sheet device of line II.

[0024] Figure 5 is a schematic cross-sectional view of a transfer film.

[0025] Figure 6 It is a schematic diagram for explaining the manufacturing steps of the elastomer film.

[0026] Figure 7 It is a schematic diagram for explaining the steps of heat pressing.

[0027] Figure 8 is a schematic cross-sectional view of a sheet-like device for explaining the step of removing the carrier film.

[0028] Fig. 9 This is a partially enlarged plan view showing a part of the sheet device according to the second embodiment.

[0029] Fig.10 It means along Fig. 9 A partial cross-sectional view of the cross section of the sheet device along line II-II.

[0030] Fig.11 It means along Fig. 9 Partial cross-sectional view of the cross section of a III-III line sheet device.

[0031] Fig.12 It is a partially enlarged plan view showing an example of a sheet device according to a modification.

[0032] Fig.13 It is a partially enlarged plan view showing another example of the sheet device according to the modification.

[0033] Fig.14 It is a partially enlarged plan view showing another example of the sheet device according to the modification.

[0034] Fig.15 It is a partially enlarged plan view showing another example of the sheet device according to the modification.

[0035] Explanation of symbols

[0036] 1 wristband

[0037] 5, 6, 7A~7D chip devices

[0038] 40 First film layer

[0039] 50 Second film layer

[0040] 60 Circuit Layer

[0041] 70 Decorative Layer

[0042] 80 Circuit Film

[0043] 91 transfer film

[0044] 91a Carrier film

[0045] 61, 261, 361, 461, 561, 661 first conversion unit

[0046] 62, 262, 362, 462, 562, 662 Second conversion unit

[0047] 263, 563, 663 Third conversion unit

[0048] D1 First direction

[0049] D2 Second direction

[0050] L1 First part

[0051] L2 Second part

[0052] L3 Third part

[0053] L4 Fourth part

[0054] L5 Fifth part

[0055] R1 First Area

[0056] R2 Second Area DETAILED DESCRIPTION

[0057] <First Embodiment>

[0058] (1) Overall structure

[0059] exist Figure 1 as well as Figure 2 , a wristband 1 assembled with a sheet-like device 5 according to the first embodiment is shown. The wristband 1 is an ornament that is wrapped around the wrist of the user. The main body 10 of the wristband 1 is mainly composed of resin and elastomer, and is configured to be elastically deformable in the long side direction. The wristband 1 has a retaining portion 11 for retaining the protrusion by embedding it into the hole. Although the holes of the wristband 1 are intermittently provided, the main body 10 of the wristband 1 is deformed, so that the wristband 1 can be appropriately worn on the wrist of the person. In such wearing, especially in the long side direction ( Figure 3 as well as Figure 4 The extension (elongation) in the first direction D1) shown is important. Figure 1 The wristband 1 shown in the figure includes a pulse measurement device 20 and a touch sensor 30. In this embodiment, the sheet device 5 is composed of a main body 10 and the touch sensor 30.

[0060] The pulse measurement device 20 has a function of measuring the pulse of a person wearing the wristband 1 and a function of a clock. The pulse measurement device 20 has a display unit 21 that displays the pulse and time. Figure 1 The display unit 21 shows that the pulse rate for one minute is "65" and the current time is "11:24".

[0061] The main body 10 of the wristband 1 is provided with a storage portion 13 for storing the pulse measurement device 20. The pulse measurement device 20, which is thin and has a substantially rectangular appearance, can be inserted into the storage portion 13 from the side of the wristband 1. The pulse measurement device 20 is connected to the touch sensor 30 by being inserted into the storage portion 13. Although not shown in the figure, the pulse measurement device 20 has an insertion portion for inserting and electrically connecting the touch sensor 30. Figure 1 The touch sensor 30 shown is an input device for inputting numerical values ​​of 0 to 9.

[0062] Here, as a flexible electrical product, a wristband 1 worn directly on the body is cited, but the sheet-like device according to the present invention can also be worn on clothing such as clothes. Among the methods of wearing the sheet-like device on clothing, there are methods such as sewing it into the clothing, adhering it to the clothing, holding it on the clothing with a fixing member, or sandwiching it between a plurality of cloths of the clothing.

[0063] (2) Detailed structure

[0064] (2-1) Description of the Structure of the Touch Sensor 30

[0065] exist Figure 3 as well as Figure 4 In FIG. 1 , an upper portion 31 of the touch sensor 30 is shown for inputting numerical values ​​“0”, “1”, “2”, “3”. Figure 4 In the figure, it is shown that there are Figure 3 The II wire cuts off the cross section of wrist strap 1. Figure 3 as well as Figure 4 In FIG. 1 , the long side direction is the first direction D1 indicated by the arrow. Figure 3 as well as Figure 4 As shown, the touch sensor 30 is embedded in the main body 10 and integrated with the main body 10 .

[0066] The touch sensor 30 includes a first film layer 40 and a circuit layer 60. The main body 10 includes a second film layer 50 and a decorative layer 70. In the present invention, the film layer is a thin film-like layer. The thickness of the first film layer 40 is, for example, 25 μm to 100 μm. The thickness of the second film layer 50 is, for example, 100 μm to 5 mm. The thickness of the circuit layer 60 is, for example, 1 μm to 50 μm. The thickness of the decorative layer 70 is, for example, 5 μm to 100 μm.

[0067] The first film layer 40 is a layer with thermoplastic resin as the main material. In this specification, "as the main material" means that the material accounts for more than 50% by weight of the whole. The first film layer 40, for example, uses polyethylene terephthalate (PET) as the main material. In this case, the first film layer 40 can be composed of polyethylene terephthalate alone, or a filler can be added at a ratio of less than 50% by weight. For example, the first film layer 40 can be composed of 90% by weight PET and 10% by weight filler. As fillers, for example, there are other thermoplastic resins, thermosetting resins, and inorganic substances. As inorganic substances, for example, there are talc, carbon fiber, and ceramics. As thermoplastic resins, in addition to polyethylene terephthalate, there are polyimide (PI), polycarbonate (PC), and polyethylene naphthalate (PEN).

[0068] The second film layer 50 is a layer with thermoplastic elastomer (TPE) as the main material. Examples of thermoplastic elastomers include amide TPE (TPA), ester TPE (TPC), olefin TPE (TPO), styrene TPE (TPS), and polyurethane TPE (TPU). The second film layer 50 may also be filled with a filler of 50% by weight or less. TPE, which is the main material of the second film layer 50, has a greater elongation (stretching rate, elongation) per unit length at 20°C than the thermoplastic resin, which is the main material of the first film layer 40. Furthermore, the second film layer 50, which has such a thermoplastic elastomer as the main material, has a greater elongation per unit length at 20°C than the first film layer 40, which has a thermoplastic resin as the main material. The second film layer 50 is bonded to the first film layer 40.

[0069] The circuit layer 60 has: a first conversion section 61 having a first conversion function; a second conversion section 62 having a second conversion function; and wiring 69. The conversion function in the present invention is a function of converting a certain electrical phenomenon into other physical phenomena other than the electrical phenomenon. The conversion function in this case also includes a function of converting a certain electrical phenomenon into other electrical phenomena other than the electrical phenomenon. The first conversion section 61 and the second conversion section 62 are connected to an external device existing outside the circuit layer 60 through the wiring 69. In the first embodiment, the pulse measurement device 20 is an external device connected through the wiring 69. The circuit layer 60 is bonded to the first film layer 40. The first conversion section 61 has a first conversion function for inputting a numerical value "0", and the second conversion section 62 has a second conversion function for inputting a numerical value "2". The first conversion function and the second conversion function in this case are functions of converting changes in electrostatic capacitance generated by the contact of the finger of the wearer of the wristband 1 with the main body 10 on the first conversion section 61 or the second conversion section 62 into electrical signals.

[0070] In the first embodiment, the first conversion function and the second conversion function are functions of converting the change of electrostatic capacitance into an electrical signal and the sheet device 5 includes a touch sensor 30, but the components constituting the sheet device are not limited to this type of touch sensor. For example, other sensors other than the touch sensor that converts physical quantities into electrical signals can be included in the sheet device. In addition, among the functions that can be used as the first conversion function and the second conversion function, there are, for example, a photoelectric conversion function, a thermal-electric conversion function, and an electric wave-current conversion function. The photoelectric conversion function has a function of converting electricity into light and a function of converting light into electricity. Among the devices that play the function of converting electricity into light, there is, for example, an LED (Light Emitting Diode). Among the devices that play the function of converting light into electricity, there are, for example, solar cells and photodiodes. Among the devices that play the function of converting electric heat into heat, there is a heater. Among the devices that play the function of converting electric waves into current, there is an antenna. In addition, in the first embodiment, the case where the first conversion function and the second conversion function are the same conversion function is described, but the first conversion function and the second conversion function may also be different conversion functions. Different conversion functions are, for example, the above-mentioned sensor and light-electric conversion function, sensor and heat-electric conversion function, sensor and electric wave-current conversion function, light-electric conversion function and heat-electric conversion function, light-electric conversion function and electric wave-current conversion function, heat-electric conversion function and electric wave-current conversion function. The first conversion unit having the first conversion function and the second conversion unit having the second conversion function are configured to allow current to flow respectively.

[0071] like Figure 4 As shown, the sheet device 5 has a first portion L1, a second portion L2, and a third portion L3 when observing a cross section along the II line. The first portion L1, the second portion L2, and the third portion L3 are arranged in sequence in the first direction D1 within the surface of the second film layer 50. The region including the first portion L1, the second portion L2, and the third portion L3 arranged along the first direction D1 is the first region R1. The first region R1 is configured so that the elongation per unit length at 20°C when the same force is applied along the first direction D1 is greater than the elongation per unit length of the first film layer 40 alone. The elongation per unit length of the first portion L1 and the third portion L3 is substantially the same as the elongation per unit length of the first film layer 40 alone. However, since the elongation per unit length of the second portion L2 at 20°C is greater than the elongation per unit length of the first film layer 40 alone, when the first region R1 as a whole is regarded as a component, the elongation per unit length of the first region R1 at 20°C is greater than the elongation per unit length of the first film layer 40 alone.

[0072] The first portion L1 is a portion where the first film layer 40, the first conversion portion 61, and the second film layer 50 overlap. The second portion L2 is a portion where the first film layer 40 does not exist but the second film layer 50 exists. The third portion L3 is a portion where the first film layer 40, the second conversion portion 62, and the second film layer 50 overlap. The first portion L1, the second portion L2, and the third portion L3 are configured to have substantially the same thickness.

[0073] In addition, the conversion part for inputting the value "1" is another conversion part 63, and the conversion part for inputting the value "3" is another conversion part 64. At this time, the overlapping part of the first film layer 40, the conversion part 63 and the second film layer 50 is equivalent to the first part, the overlapping part of the first film layer 40, the conversion part 64 and the second film layer 50 is equivalent to the third part, and the part of the slit 81 between these parts equivalent to the first part and the third part is equivalent to the second part. In this way, the area where the conversion part 63 and the conversion part 64 are arranged is also an area equivalent to the first area R1 where the first part, the second part and the third part are arranged in sequence along the first direction D1. In this way, a plurality of columns of the first area R1 along the first direction D1 can also be provided.

[0074] However, when focusing on the first conversion part 61, the second parts L2 and L21 are arranged on both sides of the first conversion part 61, and the second parts L2 and L21 are parts where the first film layer 40 does not exist and the second film layer 50 exists. Such a structure is also the same for the second conversion part 62 and the conversion parts 63 and 64. In this way, when both sides of the first conversion part 61 are sandwiched by the parts where the first film layer 40 does not exist and the second film layer 50 exists, it is difficult for stress to be transmitted from both sides of the first conversion part 61 to the first conversion part 61. The second conversion part 62 and the conversion parts 63 and 64 also have such an effect.

[0075] The decorative layer 70 is formed on the side where the display unit 12 is arranged, that is, the surface side, of the two main surfaces of the second film layer 50. Numerical values ​​from "0" to "9" are depicted in the decorative layer 70. For example, the numerical value "0" is arranged at a location overlapping the first conversion unit 61. Therefore, the wearer of the wristband 1 can input the numerical value "0" to the pulse measurement device 20 through the touch sensor 30 by touching the location where "0" is depicted on the decorative layer 70.

[0076] The surface of the decorative layer 70, in other words, the surface of the second film layer 50, has concavoconvex 71. Here, the case where the concavoconvex 71 is formed on the surface of the decorative layer 70 is described, but the concavoconvex 71 may be formed, for example, on the back surface of the second film layer 50. In addition, the concavoconvex 71 of the decorative layer 70 may not be formed. In the wristband 1, the concavoconvex 71 on the surface of the decorative layer 70 functions not only as a decoration but also as a mark for identifying the front and back of the wristband 1.

[0077] (2-2) Description of the Pulse Measurement Device 20

[0078] The pulse measuring device 20 is a device connected to the sheet device 5. The pulse measuring device 20 contacts the wearer of the wristband 1 through the opening 14 to measure the pulse. As already described, the pulse measuring device 20 can display the measured pulse and time for one minute on the display unit 12. The pulse measuring device 20 is connected to the sheet device 5, and a numerical value from "0" to "9" can be input through the sheet device 5.

[0079] For example, when the pulse measurement device 20 receives an input, when the wearer of the wristband 1 touches a place where a number such as "0" is depicted with a finger, a numerical value such as "0" is input to the pulse measurement device 20. When the wearer of the wristband 1 wants to know the pulse at 11 o'clock, for example, the touch sensor 30 is used to change to a predetermined input mode, and then inputs the numerical values ​​of "1", "1", "0", and "0". After the four-digit value is input, the display unit 12 of the wristband 1 switches, for example, displays "11:00" and "68", and notifies the wearer of the wristband 1 that the pulse at 11 o'clock is 68 beats / minute.

[0080] (3) Method for manufacturing sheet device 5

[0081] The center of the pellet 5 is Figure 7 The steps of hot pressing are shown. Figure 7 In the heat pressing step shown, the first elastic film 93 and the second elastic film 94 are arranged on both sides of the circuit film 80 .

[0082] (3-1) Formation of circuit film

[0083] Figure 7 The circuit film 80 shown is a film including a first film layer 40 and a circuit layer 60. A circuit is formed on the resin film, and a slit 81 (see Figure 3 ), a circuit film 80 is made. The circuit layer 60 that functions as the touch sensor 30 is formed, for example, by etching a metal foil bonded to the first film layer 40. Alternatively, the circuit layer 60 is formed, for example, by screen printing a conductive ink. Alternatively, the circuit layer 60 is formed, for example, by etching a metal film vapor-deposited on the first film layer 40. The slit 81 is formed, for example, by punching a punch. The width of the first direction D1 of the slit 81 is, for example, 10 mm to 500 mm. Either the formation of the circuit layer 60 or the formation of the slit 81 may be performed first.

[0084] (3-2) Formation of elastic film

[0085] First, prepare Figure 5The transfer film 91 shown in FIG. 9A has a carrier film 91a, a top layer 91b, a pattern layer 91c, and an adhesive layer 91d. The carrier film 91a is, for example, a PET film having a thickness of 25 μm to 100 μm. In addition, the film used in the carrier film 91a is not limited to the PET film, and may be other resin films.

[0086] The top layer 91b has the function of protecting the pattern layer 91c and covers the entire pattern layer 91c. By forming the top layer 91b, the wristband 1 is given high durability. As the material of the top layer 91b, for example, a polyurethane-based thermoplastic resin can be cited. In addition, the transfer film 91 can also be a structure without the top layer 91b.

[0087] The pattern layer 91c is a layer having a pattern. The material constituting the pattern layer 91c includes, for example, resins such as acrylic resin, vinyl chloride-vinyl acetate copolymer resin, thermoplastic polyurethane resin, polyester resin, and pigments or dyes added to the resin. In addition, the pattern layer 91c may also be designed with a metallic tone using, for example, aluminum paste or mirror ink.

[0088] Examples of the resin used in the adhesive layer 91 d include polyurethane resins, polyamide resins, acrylic resins, vinyl chloride vinyl acetate copolymer resins, and synthetic rubbers. The adhesive layer 91 d develops adhesiveness by heat, thereby increasing the adhesiveness between the decorative layer 70 and the second film layer 50 .

[0089] The top layer 91b, the pattern layer 91c and the adhesive layer 91d are formed, for example, by gravure printing, screen printing or transfer printing. The top layer is formed, for example, with a thickness of 1 μm to 10 μm. The pattern layer 91c is formed, for example, with a thickness of 1 μm to 50 μm. The thickness of the adhesive layer 91d is, for example, 1 μm to 10 μm.

[0090] like Figure 6 As shown, the prepared transfer film 91 is unwound from a winding roll and supplied. The transfer film 91 is conveyed by the surface of the roller 101. The thermoplastic polyurethane elastomer 92 (TPU92) extruded from the extruder 102 into a film is adhered to the transfer film 91 on the roller 101. The TPU92 is formed so as to be in contact with the adhesive layer 91d. In this way, the first elastic film 93 is formed from the transfer film 91 and the TPU92.

[0091] The second elastic film 94 (see Figure 7 ) is a film composed only of TPU, so the description of the formation method is omitted here.

[0092] (3-3) Description of hot pressing

[0093] In the step of performing heat pressing, Figure 7As shown, the circuit film 80, the first elastic film 93 and the second elastic film 94 are overlapped and hot pressed. When hot pressing is performed, the first elastic film 93, the circuit film 80 and the second elastic film 94 are arranged in sequence from the side close to the first mold 110 between the first mold 110 and the second mold 120. The first mold 110 is formed with a concave-convex 111 for forming the concave-convex 71 provided on the surface of the wristband 1. Here, the spacer 130 for forming the storage portion 13 is overlapped with the circuit film 80. The shape of the spacer 130 is, for example, a shape that imitates the appearance of the pulse measurement device 20. The spacer 130 can also be a sliding core of a metal mold including the first mold 110 and the second mold 120. Hot pressing is performed at 150° C. for 10 minutes, for example.

[0094] (3-4) Removal of carrier film

[0095] like Figure 8 As shown, after the heat pressing is completed, the carrier film 91a is peeled off. Figure 8 The cross-sectional shape of the wristband 1 is schematically shown. During hot pressing, the first mold 110 is pressed from above the carrier film 91a, thereby preventing the occurrence of undesirable conditions during hot pressing, such as damage to the wristband 1. In addition, after the hot pressing is completed, the spacer 130 is removed. In this embodiment, the carrier film 91a is used as a protective film, thereby reducing the amount of protective film used.

[0096] <Second Embodiment>

[0097] In the first embodiment, the sheet-like device 5 having the first region R1 is described, and the first region R1 is a portion where the first film layer 40, the first conversion portion 61, and the second film layer 50 overlap (for example, the first portion L1), a portion where the first film layer 40 does not exist but the second film layer 50 exists (for example, the second portion L2), and a portion where the first film layer 40, the second conversion portion 62, and the second film layer 50 overlap (for example, the third portion L3) are sequentially arranged only in the first direction D1. However, the arrangement of the three portions as described above may also be performed with respect to multiple directions.

[0098] In a second embodiment, if Fig. 9 As shown, two directions are considered: a first direction D1 and a second direction D2 which is a direction orthogonal to the first direction D1.

[0099] (4) Structure of Sheet Device

[0100] exist Fig. 9 , a part of the sheet device 6 according to the second embodiment is shown. Fig. 9 The sheet device 6 shown has a main body portion 210 , a light emitting portion 220 , and a touch sensor 230 . Fig.10 It is shown that there are Fig. 9 The cross section of the sheet device 6 is cut along the line II-II. Fig.11 It is shown that there are Fig. 9 The cross section of the sheet device 6 is cut along the III-III line. The light emitting portion 220 and the touch sensor 230 include a first film layer 40 and a circuit layer 60. The circuit layer 60 of the light emitting portion 220 includes an LED element 65. Figures 9 to 11 As shown, the light emitting unit 220 and the touch sensor 230 are embedded in the main body 210 and integrated with the main body 210. The main body 210 includes a second film layer 50 and a decorative layer 70. The decorative layer 70 has a surface with concavoconvexities 71 formed thereon.

[0101] The circuit layer 60 has: a first conversion section 261 having a first conversion function; a second conversion section 262 having a second conversion function; a third conversion section 263 having a third conversion function; and a wiring 69. The first conversion section 261, the second conversion section 262, and the third conversion section 263 are connected to an external device existing outside the circuit layer 60 through the wiring 69.

[0102] The circuit layer 60 is bonded to the first film layer 40. The first conversion part 261 of the second embodiment has a first conversion function of converting electricity into light. The second conversion part 262 and the third conversion part 263 have a function of converting the change in electrostatic capacitance generated by the finger of the wearer of the sheet device 6 contacting the main body 210 on the second conversion part 262 or the third conversion part 263 into an electrical signal.

[0103] In the second embodiment, as the first conversion function, the function of converting electricity into light is described as an example, but the first conversion function may also be, for example, a sensor function that converts a physical quantity into an electrical signal, a thermal-electric conversion function, or an electric wave-current conversion function. In addition, the second conversion function and the third conversion function are functions that convert changes in electrostatic capacitance into electrical signals and the sheet device 6 includes a touch sensor 230, but the devices constituting the sheet device are not limited to touch sensors. For example, other sensors other than the touch sensor that converts a physical quantity into an electrical signal can be included in the sheet device. In addition, the functions used as the second conversion function and the third conversion function include, for example, a light-electric conversion function, a thermal-electric conversion function, and an electric wave-current conversion function.

[0104] In addition, in the second embodiment, the case where the second conversion function and the third conversion function are the same function is described, but the second conversion function and the third conversion function may be different functions. In addition, in the second embodiment, the case where the first conversion function is different from the second conversion function and the third conversion function is described, but the first conversion function, the second conversion function and the third conversion function may be the same.

[0105] While observing along Fig. 9 The cross section of the II-II line shown (see Fig.10 ), the sheet device 6 has a first portion L1, a second portion L2, and a third portion L3. The first portion L1, the second portion L2, and the third portion L3 are arranged in sequence in the first direction D1 within the surface of the second film layer 50. The region including the first portion L1, the second portion L2, and the third portion L3 arranged along the first direction D1 is the first region R1. The first region R1 of the sheet device 6 is also configured so that the elongation per unit length at 20°C when the same force is applied along the first direction D1 is greater than the elongation per unit length of the first film layer 40 alone. The first portion L1 of the second embodiment is a portion where the first film layer 40, the first conversion portion 261, and the second film layer 50 overlap. The second portion L2 is a portion where the first film layer 40 does not exist and the second film layer 50 exists. The third portion L3 is a portion where the first film layer 40, the second conversion portion 262, and the second film layer 50 overlap. These first portion L1, the second portion L2, and the third portion L3 are configured to have substantially the same thickness. The second portion L2 is provided by forming a first slit 281 on the first film layer 40. The first slit 281 extends from an end of the first film layer 40 along the second direction D2.

[0106] While observing along Fig. 9 The cross section of line III-III shown in FIG. Fig.11 ), the sheet device 6 has a first portion L1, a fourth portion L4, and a fifth portion L5. The first portion L1, the fourth portion L4, and the fifth portion L5 are arranged in sequence in the second direction D2 within the surface of the second film layer 50. The region including the first portion L1, the fourth portion L4, and the fifth portion L5 arranged along the second direction D2 is the second region R2. The second region R2 of the sheet device 6 is configured such that the elongation per unit length at 20°C when the same force is applied along the second direction D2 is greater than the elongation per unit length of the first film layer 40 alone.

[0107] The fourth portion L4 of the second embodiment is a portion where the first film layer 40 does not exist and the second film layer 50 exists. The fifth portion L5 is a portion where the first film layer 40, the third conversion portion 263, and the second film layer 50 overlap. The first portion L1, the fourth portion L4, and the fifth portion L5 are configured to have substantially the same thickness. The fourth portion L4 is provided by forming the second slit 282 on the first film layer 40. The second slit 282 extends from the end of the first film layer 40 along the first direction D1.

[0108] If we focus on the first conversion part 261, except for a part, the first conversion part 261 is surrounded by the part where the first film layer 40 does not exist and the second film layer 50 exists. In other words, more than 90% of the periphery of the first conversion part 261 is surrounded by the part where the first film layer 40 does not exist and the second film layer 50 exists. The same is true for the second conversion part 262 and the third conversion part 263. In this way, when more than 90% of the periphery of the first conversion part 261 is surrounded by the part where the first film layer 40 does not exist and the second film layer 50 exists, it is difficult for stress to be transmitted from the periphery of the first conversion part 261 to the first conversion part 261. The second conversion part 262 and the third conversion part 263 also have such an effect.

[0109] The decorative layer 70 is formed on the surface of the second film layer 50 on the side close to the LED element 65 of the two main surfaces. On the decorative layer 70, for example, a display related to the second conversion portion 262 and the third conversion portion 263 is drawn. On the surface of the decorative layer 70, the concavoconvex 71 is formed. Here, the case where the concavoconvex 71 is formed on the surface of the decorative layer 70 is described, but the concavoconvex may be formed on the back surface of the second film layer 50, for example. In addition, the surface concavoconvex 71 of the decorative layer 70 may not be formed.

[0110] The sheet device 6 of the second embodiment can also be configured to include the following steps, similarly to the manufacturing method of the sheet device 5 of the first embodiment: forming a circuit film; forming an elastic film; performing heat pressing; and peeling off the carrier film as a protective film.

[0111] (5) Modification

[0112] (5-1) Modification 1

[0113] In addition to the sheet device 5 of the first embodiment and the sheet device 6 of the second embodiment described above, the sheet device may take various shapes. Figures 12 to 15 Examples of shapes of other sheet-like components 7A to 7D are shown in FIG.

[0114] Fig.12 The sheet device 7A shown has a main body 310 extending in a long strip shape in a first direction D1. The first film layer 40 has a shape that connects an S-shape and an inverted S-shape. The second film layer 50 has a strip shape extending along the first direction D1. Fig.12In the sheet device 7A shown, the first region R1 is formed in the region including the first conversion portion 361 and the second conversion portion 362. In the sheet device 7A, a region corresponding to the first region R1 is also formed in the region including another group of other conversion portions 363 and 364. In the sheet device 7A, by separating the wiring 69 connected to the first conversion portion 361 and the other conversion portion 363 from the wiring 69 connected to the second conversion portion 362 and the other conversion portion 364, the wiring 69 is unlikely to be disconnected even if the sheet device 7A is repeatedly expanded and contracted in the first direction D1.

[0115] Fig.13 The sheet device 7B shown has a main body portion 410 extending long in the first direction D1. Fig.13 The state of the main body 410 shown is that it is gently bent along the first direction D1. Fig.13 A force is applied to the main body 410 to bend the main body 410. When the force is removed, the main body 410 returns to a shape extending straight along the first direction D1. The first film layer 40 has a trunk 40a and a plurality of branches 40b extending linearly along the first direction. Each branch 40b extends in a direction intersecting the trunk 40a, more specifically, in a direction orthogonal to the trunk 40a. The second film layer 50 is in a strip-like shape extending along the first direction D1. Fig.13 In the sheet device 7B shown, the first region R1 is formed in the region including the first conversion portion 461 and the second conversion portion 462. In the sheet device 7B, a region corresponding to the first region R1 is also formed in the region including another group of other conversion portions 463 and 464. In the sheet device 7A, by separating the wiring 69 connected to the first conversion portion 461 and the other conversion portion 463 from the wiring 69 connected to the second conversion portion 462 and the other conversion portion 464, even if the sheet device 7B is bent or returned in a straight line in the first direction D1, the wiring 69 is difficult to be disconnected.

[0116] Fig.14 The sheet device 7C shown has a disc-shaped main body 510. Since the main body 510 is disc-shaped, it extends in the first direction D1 and the second direction D2. The first film layer 40 has a vortex shape. In addition, here, the vortex is formed by bending a straight portion, but the vortex shape can also be formed by only a curve, for example. The second film layer 50 has a disc shape. Fig.14 In the sheet device 7C shown, a first region R1 is formed in a region including the first conversion portion 561 and the second conversion portion 562. In the sheet device 7C, a second region R2 including the first conversion portion 561 and the third conversion portion 563 is formed.

[0117] The sheet device 7C is configured to be easily expandable and contractible not only in the first direction D1 and the second direction D2 but also in a direction perpendicular to the in-plane direction in which the disc-shaped main body 510 extends. When such a main body 510 is easily expandable and contractible in a direction perpendicular to the in-plane direction, it is easy to apply to a part of the body such as an elbow, knee, shoulder, etc. that protrudes relative to the surrounding area.

[0118] In addition, Fig.14 In the sheet device 7C, the first part, the second part, and the third part are arranged in the first direction D1, and the first part, the fourth part, and the fifth part are arranged in the second direction D2. However, the regions where the first film layer 40, the overlapping part of the conversion part and the second film layer 50, the part where the first film layer 40 does not exist but the second film layer 50 exists, and the overlapping part of the first film layer 40, other conversion parts and the second film layer 50 are sequentially arranged are not only arranged along the first direction D1 and the second direction D2, but also other regions arranged along directions other than the first direction D1 and the second direction D2 may be provided. As such other regions, for example, in the sheet device 7C, a third region R3 including a third conversion part 563 and a fourth conversion part 564 is formed, and a fourth region R4 including another set of a fifth conversion part 565 and a sixth conversion part 566 is formed.

[0119] Fig.15 The sheet-like device 7D shown has a main body 610 that is rectangular in plan view. Fig.15 In the figure, the main body 610 is cut so that two opposing sides are omitted. The main body 610 extends in the first direction D1 and in the second direction D2. When the side indicated by the cut is called the right side and the other side is called the left side, the first film layers 40 in two columns extend from the right side to the left side, and the first film layers 40 in two columns are merged into one column after two U-turns and extend to the left side. Fig.15 In the sheet device 7D shown, a first region R1 is formed in a region including a first conversion portion 661 and a second conversion portion 662. In the sheet device 7D, a second region R2 including a first conversion portion 661 and a third conversion portion 663 is formed. In the second region R2 of the sheet device 7D, only a portion of the second film layer 50 is divided at a portion where the first film layer 40 and the second film layer 50 overlap. In this way, even if only a portion of the second film layer 50 is divided at a portion where the first film layer 40 and the second film layer 50 overlap, there is an effect of improving the elongation of the second region R2 in the second direction D2. In the sheet device 7D, a third region R3 including another set of a fourth conversion portion 664 and a fifth conversion portion 665 is also formed. The sheet device 7D having a structure in which a plurality of structures in which the first film layer 40 makes two U-turns are combined is easy to bend in a two-dimensional direction of the plane.

[0120] (5-2) Modification 2

[0121] In the first and second embodiments, the circuit film 80 is buried in the second film layer 50 . However, the sheet device of the present invention may have the second film layer 50 formed only on the front or back side of the circuit film 80 .

[0122] (5-3) Modification 3

[0123] In the first embodiment and the second embodiment described above, the case where the decorative layer 70 is provided on the sheet devices 5 and 6 is described. However, the sheet device of the present invention does not necessarily need to be provided with a decorative layer.

[0124] (5-4) Modification 4

[0125] In the first embodiment and the second embodiment described above, the case where the projections and depressions 71 are formed on the sheet-like devices 5 and 6 is described. However, the sheet-like device of the present invention does not necessarily have to have projections and depressions on the surface.

[0126] (5-5) Modification 5

[0127] In the first embodiment, the second embodiment and the modified examples, the main body 10, 210, 310, 410, 510, 610 is described as being in the shape of a strip, a rectangular sheet or a disk. However, the shape of the main body of the sheet device of the present invention is not limited to these shapes. For example, it may be in a complex shape such as a glove.

[0128] (6) Features

[0129] (6-1)

[0130] As described above, in the sheet-like devices 5, 6, 7A to 7D, the first film layer 40 has a smaller elongation per unit length at 20°C than the second film layer 50. Therefore, compared with the case where the circuit layer 60 is directly formed on the second film layer 50 without using the first film layer 40, by bonding the circuit layer 60 on the first film layer 40, the expansion and contraction of the second film layer 50 at the portion overlapping with the circuit layer 60 is suppressed by the first film layer 40. As a result, the first conversion function of the first conversion portion 61 of the circuit layer 60 and the second conversion function of the second conversion portion 62 are better protected by the first film layer 40, and the first conversion portion 61 and the second conversion portion 62 operate stably.

[0131] In addition, the stress applied to the first film layer 40 is relieved by the thermoplastic elastomer in the second portion L2 where the first film layer 40 does not exist but the second film layer 50 exists. As a result, the circuit layer 60 bonded to the first film layer 40 is protected.

[0132] Furthermore, the sheet-like devices 5, 6, 7A, and 7D are configured such that the elongation per unit length of the first region R1 is greater than the elongation per unit length of the first film layer 40 alone at 20°C. The sheet-like devices 5, 6, 7A to 7D configured in this way can be flexibly deformed in accordance with the deformation of the surroundings, compared with the case where the elongation of the first region R1 is equal to or less than the elongation of the first film layer 40 alone. As a result, for example, when clothing includes the sheet-like devices 5, 6, 7A to 7D having such a first region R1, the wearing feeling of the clothing becomes better. In addition, the elongation of the first region R1 and the first film layer 40 is compared with the elongation per unit length at 20°C because the elongation at room temperature is important for the use of the sheet-like device.

[0133] (6-2)

[0134] In the sheet-like devices 6, 7C, and 7D described above, the circuit layer 60 has a third conversion portion 263, 563, and 663 having a third conversion function, and the sheet-like devices 6, 7C, and 7D have a fourth portion L4 where the first film layer 40 does not exist but the second film layer 50 exists, and a fifth portion L5 where the first film layer 40, the third conversion portion 263, 563, and 663 overlap the second film layer 50. In the sheet-like device 6, the first portion L1, the fourth portion L4, and the fifth portion L5 are arranged in sequence in the second direction D2 different from the first direction D1 in the plane of the second film layer 50. The second region R2 including the first portion L1, the fourth portion L4, and the fifth portion L5 has an elongation per unit length greater than the elongation per unit length of the first film layer 40 alone when the same force is applied in the second direction D2 at 20°C. In the sheet-like device 6 thus configured, the stability of the first to third conversion function is improved not only in the first direction D1 but also in the second direction D2, and the flexibility is improved.

[0135] (6-3)

[0136] In the sheet-like devices 5, 6, 7A to 7D, the second portion L2 has substantially the same thickness as the first portion L1 and the third portion L3. The sheet-like devices 5, 6, 7A to 7D thus constructed do not have steps at the boundaries between the first portion L1 and the third portion L3 and the second portion L2, thereby preventing the generation of stress due to jamming at these boundaries and being less prone to damage.

[0137] (6-4)

[0138] The sheet-like devices 5 and 6 described above include a decorative layer 70 bonded to the second film layer 50 and displaying a pattern. In the sheet-like devices 5 and 6, the positional relationship between the pattern of the decorative layer 70 and the first conversion part 61 and 261 and the second conversion part 62 and 262 is fixed. As a result, for example, when the sheet-like devices 5 and 6 are applied to clothing, even if the sheet-like devices 5 and 6 are deformed due to the movement of the human body, the arrangement positions of the first conversion part 61 and 261 and the second conversion part 62 and 262 can be accurately determined by the decorative layer 70. When the arrangement positions of the first conversion part 61 and 261 and the second conversion part 62 and 262 can be accurately determined, it is easy to operate and maintain the sheet-like devices 5 and 6.

[0139] (6-5)

[0140] use Figures 5 to 8 The manufacturing method of the sheet device 5 described in the description comprises the following steps: a step of bonding a circuit layer 60 having a first conversion portion 61 and a second conversion portion 62 to a first film layer 40 having a thermoplastic resin as a main material to form a circuit film 80; a step of forming a second film layer 50 having a thermoplastic elastomer as a main material which is more stretchable than the thermoplastic resin and more stretchable than the first film layer 40 at 20°C and a first elastomeric film 93 as a carrier film 91a serving as a protective film; a step of overlapping the circuit film 80 and the first elastomeric film 93 and performing heat pressing; and a step of peeling off the carrier film 91a.

[0141] In the step of performing heat pressing, the first mold 110 is pressed against the second film layer 50 via the carrier film 91 a , and while the concavo-convex 71 is formed on the surface of the second film layer 50 , the first film layer 40 and the second film layer 50 are bonded together.

[0142] Since the concavo-convex 71 is formed on the second film layer 50 in a state protected by the carrier film 91a, it is possible to prevent degradation of the surface of the sheet device 5. In such a method for manufacturing a sheet device, the number of steps in the manufacturing process can be reduced compared to a case where the concavo-convex 71 is formed on the surface of the sheet device 5 in a step different from the step of performing heat pressing on the surface of the sheet device 5.

[0143] (6-6)

[0144] The above-mentioned method for manufacturing a sheet-like device comprises the steps of forming a decorative layer 70 showing a pattern between the carrier film 91a and the second film layer 50 (see Figure 5 In the method for manufacturing the sheet-like device having such a configuration, it is possible to easily align the arrangement positions of the first conversion portion 61 and the second conversion portion 62 with the arrangement positions of the pattern.

[0145] The first and second embodiments of the present invention and their variants are described above, but the present invention is not limited to the above embodiments and variants, and various changes can be made within the scope of the main purpose of the invention. In particular, the multiple embodiments and variants described in this specification can be arbitrarily combined as needed.

Claims

1. A sheet-like device, characterized in that: have: A first film layer, wherein the first film layer uses a thermoplastic resin as a main material; a second film layer, the second film layer being bonded to the first film layer, having as a main material a thermoplastic elastomer that is more elongated than the thermoplastic resin, and having a greater elongation per unit length at 20° C. than the first film layer; as well as a circuit layer, the circuit layer having a first conversion portion having a first conversion function and a second conversion portion having a second conversion function, and being bonded to the first film layer, The sheet device comprises a first portion where the first film layer, the first conversion portion and the second film layer overlap, a second portion where the first film layer does not exist and the second film layer exists, and a third portion where the first film layer, the second conversion portion and the second film layer overlap, The first portion, the second portion, and the third portion are arranged in sequence in a first direction within the surface of the second film layer. The second portion opens at the end of the first film layer and protrudes in a manner of separating the first portion and the third portion. The first region including the first portion, the second portion, and the third portion is configured such that an elongation per unit length at 20° C. when the same force is applied in the first direction is greater than an elongation per unit length of the first film layer alone.

2. The sheet device according to claim 1, characterized in that: The circuit layer has a third conversion unit having a third conversion function. The sheet-like device has a fourth portion where the first film layer does not exist but the second film layer exists, and a fifth portion where the first film layer, the third conversion portion, and the second film layer overlap. The first portion, the fourth portion, and the fifth portion are arranged in sequence in a second direction different from the first direction within the plane of the second film layer. The elongation per unit length of the second region including the first portion, the fourth portion, and the fifth portion when the same force is applied along the second direction is greater than the elongation per unit length of the first film layer alone.

3. The sheet-like device according to claim 1 or 2, characterized in that: The second portion has substantially the same thickness as the first portion and the third portion.

4. The sheet-like device according to claim 1 or 2, characterized in that: The second film layer has a concave-convex pattern on the surface.

5. The sheet-like device according to claim 1 or 2, characterized in that: A decorative layer is bonded to the second film layer and displays a pattern.

6. A method for manufacturing a sheet device, characterized in that: The following steps are required: The step of bonding a circuit layer of a first conversion part having a first conversion function and a second conversion part having a second conversion function to a first film layer having a thermoplastic resin as a main material to form a circuit film; forming an elastomer film having a second film layer mainly made of a thermoplastic elastomer that is more stretchable than the thermoplastic resin and more stretchable than the first film layer at 20° C., and a protective film; The step of overlapping the circuit film and the elastic film and performing heat pressing; as well as a step of peeling off the protective film, In the step of performing the heat pressing, The mold is pressed onto the second film layer via the protective film, and the first film layer and the second film layer are bonded together while forming concavoconvexity on the surface of the second film layer. The first film layer, a first location where the first conversion portion and the second film layer overlap, a third location where the first film layer, the second conversion portion and the second film layer overlap, and a second location where the first film layer does not exist but the second film layer exists are arranged in the first direction within the plane of the second film layer in the order of the first location, the second location and the third location. The second portion opens at an end of the first film layer and protrudes so as to separate the first portion and the third portion.

7. The method for manufacturing a sheet device according to claim 6, characterized in that: The circuit layer has a third conversion unit having a third conversion function. In the step of performing the hot pressing, the first portion, the fourth portion where the first film layer does not exist but the second film layer exists, and the fifth portion where the first film layer, the third conversion portion and the second film layer overlap are arranged in the order of the first portion, the fourth portion and the fifth portion in a first direction within the plane of the second film layer.

8. The method for manufacturing a sheet-like device according to claim 6 or 7, characterized in that: The method comprises the step of forming a decorative layer showing a pattern between the protective film and the second film layer.

Images