A high-precision linear straight-sliding carbon diaphragm structure

Abstract

The utility model provides a high-precision linear straight-sliding carbon film structure, including an insulating substrate, a first conductive metal circuit layer, a second conductive metal circuit layer, a third conductive metal circuit layer, a fourth conductive metal circuit layer, a fifth conductive metal circuit layer, a sixth conductive metal circuit layer, a first carbon film resistor layer, and a second carbon film resistor layer. The first conductive metal circuit layer is connected to the second conductive metal circuit layer through the first carbon film resistor layer, and the fifth conductive metal circuit layer is connected to the sixth conductive metal circuit layer through the second carbon film resistor layer; the first carbon film resistor layer and the second carbon film resistor layer are both arranged in a line segment shape; the third conductive metal circuit layer and the fourth conductive metal circuit layer form a parallel relationship with the first carbon film resistor layer and the second carbon film resistor layer; one end and / or two opposite ends of the length direction of the first carbon film resistor layer and the second carbon film resistor layer are formed with an engraved edge segment by laser engraving. By setting the laser engraved edge segment, the resistance consistency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon diaphragms, in particular to a high-precision linear straight-sliding carbon diaphragm structure. Background Art

[0002] The Chinese authorization announcement number is CN 211858300 U, and the authorization announcement date is November 3, 2020. It discloses a long-life sliding potentiometer, including a base plate, a sliding seat is connected to the base plate, an upper cover is connected to the sliding seat, a resistance layer is provided on the upper end of the sliding seat, and a rolling brush module is connected to the resistance layer; the rolling brush module includes a sliding block, a toggle rod, a first conductive sheet, a second conductive sheet, and a ball bearing, and there is a gap between the first conductive sheet and the second conductive sheet. The number of the balls is four, which are respectively rollingly connected to the upper end faces of the first carbon diaphragm, the second carbon diaphragm, the third carbon diaphragm, and the fourth carbon diaphragm. The sliding potentiometer of the utility model changes the traditional sliding contact to rolling contact, which increases the product life and improves the precision. The defects of the prior art are: in the daily production process, due to the influence of factors such as material, ink model, screen, scraper, baking process, etc., the printed carbon film lacks consistency in resistance, which directly affects the consistency of current. For some products with high requirements for resistance consistency, such as military products or high-end products, the yield of products with conventional structures may not exceed 5%. In view of this situation, improvement is urgently needed. Utility Model Content

[0003] In view of the above problems, the utility model provides a high-precision linear straight-sliding carbon diaphragm structure, which improves the consistency of resistance by setting a laser-engraved edge segment, thereby improving the consistency of current and greatly improving product yield.

[0004] To achieve the above-mentioned purpose, the utility model solves the problem through the following technical solutions: a high-precision linear straight-sliding carbon film structure, including an insulating substrate, and also including a first conductive metal circuit layer, a second conductive metal circuit layer, a third conductive metal circuit layer, a fourth conductive metal circuit layer, a fifth conductive metal circuit layer, a sixth conductive metal circuit layer, a first carbon film resistor layer, and a second carbon film resistor layer. The first conductive metal circuit layer is connected to the second conductive metal circuit layer through the first carbon film resistor layer, and the fifth conductive metal circuit layer is connected to the sixth conductive metal circuit layer through the second carbon film resistor layer; the first carbon film resistor layer and the second carbon film resistor layer are both configured as line segments; the third conductive metal circuit layer and the fourth conductive metal circuit layer are in parallel with the first carbon film resistor layer and the second carbon film resistor layer; one end and / or two opposite ends in the length direction of the first carbon film resistor layer and the second carbon film resistor layer are formed with an engraved edge segment by laser engraving.

[0005] Preferably, a first trimmed edge segment is formed by laser etching at one end of the first carbon film resistor layer in the length direction and at the connection side with the first conductive metal circuit layer or the second conductive metal circuit layer; the first trimmed edge segment is located within 5% of the effective length of the first carbon film resistor layer; a second trimmed edge segment is formed by laser etching at one end of the second carbon film resistor layer in the length direction and at the connection side with the fifth conductive metal circuit layer or the sixth conductive metal circuit layer; the second trimmed edge segment is located within 5% of the effective length of the second carbon film resistor layer; the width of the first trimmed edge segment and the second trimmed edge segment is set to 0.2 mm.

[0006] Preferably, first trimmed edge segments are formed by laser etching at the opposite ends of the first carbon film resistor layer in the length direction and at the connection sides with the first conductive metal circuit layer and the second conductive metal circuit layer; the first trimmed edge segment is located within 5% of the effective length of the first carbon film resistor layer; second trimmed edge segments are formed by laser etching at the opposite ends of the second carbon film resistor layer in the length direction and at the connection sides with the fifth conductive metal circuit layer and the sixth conductive metal circuit layer; the second trimmed edge segment is located within 5% of the effective length of the second carbon film resistor layer; the width of the first trimmed edge segment and the second trimmed edge segment is set to 0.2 mm.

[0007] Preferably, a third trimmed edge segment is formed by laser etching on one side of the length direction of the first carbon film resistor layer and located between the first conductive metal circuit layer and the second conductive metal circuit layer; the third trimmed edge segment is located within 90% of the effective length of the first carbon film resistor layer; a fourth trimmed edge segment is formed by laser etching on one side of the length direction of the second carbon film resistor layer and located between the fifth conductive metal circuit layer and the sixth conductive metal circuit layer; the fourth trimmed edge segment is located within 90% of the effective length of the first carbon film resistor layer; the width of the third trimmed edge segment and the fourth trimmed edge segment is set to 0.2 mm.

[0008] Preferably, a third trimmed edge segment is formed by laser etching on opposite sides of the first carbon film resistor layer in the length direction and between the first conductive metal circuit layer and the second conductive metal circuit layer; the third trimmed edge segment is located within 90% of the effective length of the first carbon film resistor layer; a fourth trimmed edge segment is formed by laser etching on opposite sides of the second carbon film resistor layer in the length direction and between the fifth conductive metal circuit layer and the sixth conductive metal circuit layer; the fourth trimmed edge segment is located within 90% of the effective length of the first carbon film resistor layer; the width of the third trimmed edge segment and the fourth trimmed edge segment is set to 0.2 mm.

[0009] Preferably, the first conductive metal circuit layer, the second conductive metal circuit layer, the third conductive metal circuit layer, the fourth conductive metal circuit layer, the fifth conductive metal circuit layer, and the sixth conductive metal circuit layer are all set to silver layers respectively.

[0010] Preferably, the thickness of the first conductive metal circuit layer, the second conductive metal circuit layer, the third conductive metal circuit layer, the fourth conductive metal circuit layer, the fifth conductive metal circuit layer and the sixth conductive metal circuit layer is set to 8-12 um.

[0011] Preferably, the thickness of the first carbon film resistor layer and the second carbon film resistor layer is set to 10-15 um.

[0012] The beneficial effects of the utility model are as follows: one end and / or two opposite ends in the length direction of the first carbon film resistor layer and the second carbon film resistor layer are formed with an engraved edge segment by laser engraving, so that the resistance values ​​of the side edges of the first carbon film resistor layer and the second carbon film resistor layer reach a consistent target resistance value, thereby improving the consistency of the current and greatly improving the product yield; in addition, since the resistance value can be adjusted by setting the engraved edge segment, the requirements for the selection of the carbon film production substrate are reduced, so that the consistency of the resistance can be achieved without deliberately selecting the carbon film material. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural view of the first embodiment of the utility model.

[0014] Figure 2 This is a structural view of the second embodiment of the utility model (the insulating substrate is omitted).

[0015] The figures are marked as: insulating substrate 10, first conductive metal circuit layer 11, second conductive metal circuit layer 14, third conductive metal circuit layer 15, fourth conductive metal circuit layer 16, fifth conductive metal circuit layer 17, sixth conductive metal circuit layer 18, first carbon film resistor layer 12, second carbon film resistor layer 19, second trimmed edge segment 20, first trimmed edge segment 13, third trimmed edge segment 21, fourth trimmed edge segment 22. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0017] Reference Figure 1 and Figure 2As shown, this embodiment provides a high-precision linear straight-sliding carbon film structure, including an insulating substrate 10, and also including a first conductive metal circuit layer 11, a second conductive metal circuit layer 14, a third conductive metal circuit layer 15, a fourth conductive metal circuit layer 16, a fifth conductive metal circuit layer 17, a sixth conductive metal circuit layer 18, a first carbon film resistor layer 12, and a second carbon film resistor layer 19. The first conductive metal circuit layer 11 is connected to the second conductive metal circuit layer 14 through the first carbon film resistor layer 12, and the fifth conductive metal circuit layer 17 is connected to the sixth conductive metal circuit layer 18 through the second carbon film resistor layer 19; the first carbon film resistor layer 12 and the second carbon film resistor layer 19 are both configured in a line segment shape; the third conductive metal circuit layer 15 and the fourth conductive metal circuit layer 16 are in parallel with the first carbon film resistor layer 12 and the second carbon film resistor layer 19; one end and / or two opposite ends in the length direction of the first carbon film resistor layer 12 and the second carbon film resistor layer 19 are formed with an etched edge segment by laser etching.

[0018] As a preferred solution, a first trimmed edge segment 13 is formed by laser etching at one end of the first carbon film resistor layer 12 in the length direction and at the connection side with the first conductive metal circuit layer 11 or the second conductive metal circuit layer 14; the first trimmed edge segment 13 is located within 5% of the effective length of the first carbon film resistor layer 12; a second trimmed edge segment 20 is formed by laser etching at one end of the second carbon film resistor layer 19 in the length direction and at the connection side with the fifth conductive metal circuit layer 17 or the sixth conductive metal circuit layer 18; the second trimmed edge segment 20 is located within 5% of the effective length of the second carbon film resistor layer 19; the width of the first trimmed edge segment 13 and the second trimmed edge segment 20 is set to 0.2 mm.

[0019] As a preferred solution, a third trimmed edge segment 21 is formed by laser etching on opposite sides of the first carbon film resistor layer 12 in the length direction and between the first conductive metal circuit layer 11 and the second conductive metal circuit layer 14; the third trimmed edge segment 21 is located within 90% of the effective length of the first carbon film resistor layer 12; a fourth trimmed edge segment 22 is formed by laser etching on opposite sides of the second carbon film resistor layer 19 in the length direction and between the fifth conductive metal circuit layer 17 and the sixth conductive metal circuit layer 18; the fourth trimmed edge segment 22 is located within 90% of the effective length of the first carbon film resistor layer 12; the width of the third trimmed edge segment 21 and the fourth trimmed edge segment 22 is set to 0.2 mm.

[0020] In the utility model, one end and / or two opposite ends in the length direction of the first carbon film resistor layer and the second carbon film resistor layer are formed with an engraved edge segment by laser engraving, so that the resistance values ​​of the side edges of the first carbon film resistor layer and the second carbon film resistor layer reach a consistent target resistance value, thereby improving the consistency of the current and greatly improving the product yield; in addition, since the resistance value can be adjusted by setting the engraved edge segment, the requirements for the selection of the carbon film production substrate are reduced, so that the consistency of the resistance can be achieved without deliberately selecting the carbon film material.

[0021] Reference Figure 1 As shown in the first embodiment, the first carbon film resistor layer 12 has first trimmed edge segments 13 formed by laser etching at the two opposite ends in the length direction and at the connection sides with the first conductive metal circuit layer 11 and the second conductive metal circuit layer 14; the first trimmed edge segments 13 are located within 5% of the effective length of the first carbon film resistor layer 12; the second trimmed edge segments 20 are formed by laser etching at the two opposite ends in the length direction of the second carbon film resistor layer 19 and at the connection sides with the fifth conductive metal circuit layer 17 and the sixth conductive metal circuit layer 18; the second trimmed edge segments 20 are located within 5% of the effective length of the second carbon film resistor layer 19; the width of the first trimmed edge segments 13 and the second trimmed edge segments 20 is set to 0.2 mm. The first conductive metal circuit layer 11, the second conductive metal circuit layer 14, the third conductive metal circuit layer 15, the fourth conductive metal circuit layer 16, the fifth conductive metal circuit layer 17, and the sixth conductive metal circuit layer 18 are respectively set as silver layers. The thickness of the first conductive metal circuit layer 11, the second conductive metal circuit layer 14, the third conductive metal circuit layer 15, the fourth conductive metal circuit layer 16, the fifth conductive metal circuit layer 17, and the sixth conductive metal circuit layer 18 is set to 8-12 um. The thickness of the first carbon film resistor layer 12 and the second carbon film resistor layer 19 is set to 10-15 um.

[0022] Reference Figure 2As shown in the second embodiment, a third trimmed edge segment 21 is formed by laser etching on one side of the length direction of the first carbon film resistor layer 12 and located between the first conductive metal circuit layer 11 and the second conductive metal circuit layer 14; the third trimmed edge segment 21 is located within 90% of the effective length of the first carbon film resistor layer 12; a fourth trimmed edge segment 22 is formed by laser etching on one side of the length direction of the second carbon film resistor layer 19 and located between the fifth conductive metal circuit layer 17 and the sixth conductive metal circuit layer 18; the fourth trimmed edge segment 22 is located within 90% of the effective length of the first carbon film resistor layer 12, as shown at A in the figure; the width of the third trimmed edge segment 21 and the fourth trimmed edge segment 22 is set to 0.2 mm. The first conductive metal circuit layer 11, the second conductive metal circuit layer 14, the third conductive metal circuit layer 15, the fourth conductive metal circuit layer 16, the fifth conductive metal circuit layer 17, and the sixth conductive metal circuit layer 18 are respectively set as silver layers. The thickness of the first conductive metal circuit layer 11, the second conductive metal circuit layer 14, the third conductive metal circuit layer 15, the fourth conductive metal circuit layer 16, the fifth conductive metal circuit layer 17, and the sixth conductive metal circuit layer 18 is set to 8-12 um. The thickness of the first carbon film resistor layer 12 and the second carbon film resistor layer 19 is set to 10-15 um.

[0023] The above embodiments only express two implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high-precision linear straight-sliding carbon film structure, comprising an insulating substrate (10), and further comprising a first conductive metal circuit layer (11), a second conductive metal circuit layer (14), a third conductive metal circuit layer (15), a fourth conductive metal circuit layer (16), a fifth conductive metal circuit layer (17), a sixth conductive metal circuit layer (18), a first carbon film resistor layer (12), and a second carbon film resistor layer (19), wherein the first conductive metal circuit layer (11) is connected to the second conductive metal circuit layer (14) through the first carbon film resistor layer (12), and the fifth conductive metal circuit layer (17) is connected to the sixth conductive metal circuit layer (18) through the second carbon film resistor layer (19); the first carbon film resistor layer (12) and the second carbon film resistor layer (19) are both arranged in a line segment shape; the third conductive metal circuit layer (15) and the fourth conductive metal circuit layer (16) are in parallel relationship with the first carbon film resistor layer (12) and the second carbon film resistor layer (19); It is characterized in that One end and / or two opposite ends of the first carbon film resistor layer (12) and the second carbon film resistor layer (19) in the length direction are / is formed with trimmed edge segments by laser trimming.

2. A high-precision linear direct-sliding carbon diaphragm structure according to claim 1, characterized in that: A first trimmed edge segment (13) is formed by laser trimming at one end of the first carbon film resistor layer (12) in the length direction and at the connection side with the first conductive metal circuit layer (11) or the second conductive metal circuit layer (14); the first trimmed edge segment (13) is located within 5% of the effective length of the first carbon film resistor layer (12); A second trimmed edge segment (20) is formed by laser trimming at one end of the second carbon film resistor layer (19) in the length direction and at the connection side with the fifth conductive metal circuit layer (17) or the sixth conductive metal circuit layer (18); the second trimmed edge segment (20) is located within 5% of the effective length of the second carbon film resistor layer (19); The width of the first trimming edge segment (13) and the second trimming edge segment (20) is set to 0.2 mm.

3. A high-precision linear direct-sliding carbon diaphragm structure according to claim 1, characterized in that: First trimmed edge segments (13) are formed by laser trimming at opposite ends of the first carbon film resistor layer (12) in the length direction and at the connection sides with the first conductive metal circuit layer (11) and the second conductive metal circuit layer (14); the first trimmed edge segments (13) are located within 5% of the effective length of the first carbon film resistor layer (12); Second trimmed edge segments (20) are formed by laser trimming at opposite ends of the second carbon film resistor layer (19) in the length direction and at the connection sides with the fifth conductive metal circuit layer (17) and the sixth conductive metal circuit layer (18); the second trimmed edge segments (20) are located within 5% of the effective length of the second carbon film resistor layer (19); The width of the first trimming edge segment (13) and the second trimming edge segment (20) is set to 0.2 mm.

4. A high-precision linear direct-sliding carbon diaphragm structure according to claim 1, characterized in that: A third trimmed edge segment (21) is formed by laser trimming on one side of the first carbon film resistor layer (12) in the length direction and located between the first conductive metal circuit layer (11) and the second conductive metal circuit layer (14); the third trimmed edge segment (21) is located within 90% of the effective length of the first carbon film resistor layer (12); A fourth trimmed edge segment (22) is formed by laser trimming on one side of the second carbon film resistor layer (19) in the length direction and located between the fifth conductive metal circuit layer (17) and the sixth conductive metal circuit layer (18); the fourth trimmed edge segment (22) is located within 90% of the effective length of the first carbon film resistor layer (12); The width of the third trimming edge segment (21) and the fourth trimming edge segment (22) is set to 0.2 mm.

5. The high-precision linear direct-sliding carbon diaphragm structure according to claim 1, characterized in that: A third trimmed edge segment (21) is formed by laser trimming on opposite sides of the first carbon film resistor layer (12) in the length direction and between the first conductive metal circuit layer (11) and the second conductive metal circuit layer (14); the third trimmed edge segment (21) is located within 90% of the effective length of the first carbon film resistor layer (12); A fourth trimmed edge segment (22) is formed by laser trimming on opposite sides of the second carbon film resistor layer (19) in the length direction and located between the fifth conductive metal circuit layer (17) and the sixth conductive metal circuit layer (18); the fourth trimmed edge segment (22) is located within 90% of the effective length of the first carbon film resistor layer (12); The width of the third trimming edge segment (21) and the fourth trimming edge segment (22) is set to 0.2 mm.

6. A high-precision linear direct-sliding carbon diaphragm structure according to any one of claims 1 to 5, characterized in that: The first conductive metal circuit layer (11), the second conductive metal circuit layer (14), the third conductive metal circuit layer (15), the fourth conductive metal circuit layer (16), the fifth conductive metal circuit layer (17), and the sixth conductive metal circuit layer (18) are all respectively configured as silver layers.

7. A high-precision linear direct-sliding carbon diaphragm structure according to claim 6, characterized in that: The thickness of the first conductive metal circuit layer (11), the second conductive metal circuit layer (14), the third conductive metal circuit layer (15), the fourth conductive metal circuit layer (16), the fifth conductive metal circuit layer (17), and the sixth conductive metal circuit layer (18) is set to 8 to 12 um.

8. A high-precision linear direct-sliding carbon diaphragm structure according to claim 7, characterized in that: The film thickness of the first carbon film resistor layer (12) and the second carbon film resistor layer (19) is set to 10-15 um.

Images