Needle-tube-shaped tool for removing redundant materials on surface of chip and using method thereof

Abstract

The invention belongs to the technical field of electronic components, and relates to a needle-tube-shaped tool used for removing redundant materials on the surface of a chip and a using method of the needle-tube-shaped tool. The needle-tube-shaped tool comprises a tube sleeve, a piston rod, a needle head and a thin filament, and the needle head is detachably connected to one end of the tube sleeve; the piston rod is slidably inserted into the pipe sleeve from the end, away from the needle head, of the pipe sleeve. And one end of the filament is inserted from the needle head, penetrates into the pipe sleeve and is fixed under the clamping action of the piston rod and the pipe sleeve. According to the method, the problem of damage possibly caused in a traditional gold wire removing method is solved, it is guaranteed that performance parameters of electronic components are not affected, the probability of product damage is remarkably reduced, and the overall quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic components and relates to a needle-shaped tool for removing excess matter from the surface of a chip and a method of using the tool. Background Art

[0002] Before and after chip bonding, electronic components require removal of excess material from the chip entry and bonding areas. The current removal process uses nitrogen purging, chip adhesive bonding, and gold wire to remove excess material from the surface. However, even after purging and bonding, stubborn excess material can still accumulate. After bonding, chip adhesive is inconvenient to use due to location limitations. Using gold wire for removal, due to its hardness, can easily damage other bonding wires within the cavity and cause some damage to the chip surface coating. Furthermore, using gold wire is relatively costly.

[0003] Electronic components have very high requirements on the performance parameters of chips and bonding wires. Chips and bonding wires cannot have functional damage and excess material accumulation. Due to purging and sticking, there is still relatively stubborn excess material accumulation. The use of gold wire is also prone to causing varying degrees of damage, seriously affecting the performance parameters of electronic components.

[0004] Therefore, there is an urgent need to propose a new tool for removing excess materials from the chip surface. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a needle-shaped tool for removing excess materials on the surface of a chip and a method of using the same, so as to solve the problem of removing excess materials on the surface of electronic component chips and bonding wires.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A needle-shaped tool for removing excess material from the surface of a chip, comprising a sleeve, a piston rod, a needle, and a filament. The needle is detachably connected to one end of the sleeve, and the piston rod is slidably inserted into the sleeve from an end of the sleeve away from the needle.

[0008] One end of the filament is inserted from the needle head, penetrates into the interior of the tube sleeve, and is fixed under the clamping action of the piston rod and the tube sleeve.

[0009] Furthermore, the sleeve includes a tube body and a nipple arranged at one end thereof, the piston rod includes a piston shaft and a rubber piston body and a piston handle respectively arranged at both ends of the piston shaft, and the needle includes a needle bolt and a needle stem fixedly connected to the needle bolt;

[0010] The needle bolt sleeve is arranged on the nipple to connect the needle to one end of the tube sleeve. One end of the rubber piston body arranged on the piston rod is inserted into the end of the tube sleeve away from the nipple, and the piston rod is pushed by the piston handle to perform axial reciprocating movement.

[0011] Furthermore, the filament is made of polyamide material, and its length should be sufficient to at least pass from the needle tip of the needle stem to the inside of the tube sleeve.

[0012] Furthermore, the length of the filament is sufficient to pass through the end of the tube sleeve away from the needle tip of the needle stem, so as to facilitate the insertion of the piston rod and the control of the filament.

[0013] Furthermore, a ventilation hole is provided at a portion of the tube body close to the nipple.

[0014] Furthermore, the size of the tube does not exceed φ0.5 cm.

[0015] Furthermore, the specification of the needle is 32G, and the length of the needle stem is 1 to 1.5 cm, and the needle stem is straight or curved.

[0016] Furthermore, the diameter of the filament is 90 μm.

[0017] On the other hand, the present invention also provides a method for using a needle-shaped tool for removing excess matter from the surface of a chip. The needle-shaped tool for removing excess matter from the surface of a chip is used, and the method of using the needle-shaped tool is as follows:

[0018] First, install the needle on the tube sleeve, then insert the filament into the needle and the tube sleeve from the end of the needle away from the tube sleeve, and pass it out of the tube sleeve through the end of the tube sleeve away from the needle, leaving a bare filament at the end of the needle away from the tube sleeve for removing excess materials on the chip surface;

[0019] Then insert one end of the piston rod into the sleeve from the end of the sleeve away from the needle, and press the inner wall of the sleeve at the end of the sleeve close to the needle to fix the position of the filament, and then hold the sleeve and remove excess materials on the chip surface through the exposed filament.

[0020] Furthermore, the needle stem in the needle head is clamped and flattened, so that the filament cannot move freely without external force, thereby further fixing the position of the filament;

[0021] During the process of removing excess material from the chip surface, when the length of the exposed filament is insufficient to remove the excess material from the chip surface, the piston rod is controlled to move away from the needle to loosen the clamping of the filament by the piston rod and the inner wall of the sleeve, and then the filament is manually pulled so that the length of the exposed filament reaches a length that can be used to remove excess material from the chip surface, and then the piston rod is controlled to move toward the end close to the needle to re-clamp the filament to fix the position of the filament.

[0022] The beneficial effects of the present invention are:

[0023] First, the present invention proposes an innovative needle-like tool, the core of which is to use a polyamide filament to remove excess debris from the surfaces of chips and bonding wires. This filament is soft and does not damage the chip plating or gold wires, effectively solving the damage problem that can occur with traditional gold wire removal methods. This innovative design not only ensures that the performance parameters of electronic components are not affected, but also significantly reduces the probability of product damage and improves overall quality. Compared with traditional methods, this invention performs better in protecting chips and bonding wires, ensuring the reliability and stability of electronic components.

[0024] Secondly, the needle-shaped tool of the present invention is highly flexible and adaptable. Each component in the tool is reusable, making replacement quick and easy. In particular, the use of polyamide filaments is not only more affordable than gold wire, but also, when the filament wears out during use, a portion can be easily pulled out from the needle tip and the used portion can be cut off with a blade, thereby extending the tool's service life and reducing its cost. This design makes the present invention more economical in practical applications and meets the needs of different scenarios.

[0025] Finally, the needle-tubular tool of the present invention will not cause residue or scratches on the chip during the process of removing excess materials. The use of chip glue in traditional methods may cause colloid residue, which in turn contaminates the chip surface. The polyamide filaments used in the present invention completely avoid this problem and ensure the cleanliness of the chip surface. This advantage makes the present invention have higher application value in the manufacturing process of electronic components and helps to improve the qualification rate and reliability of products. In summary, the needle-tubular tool of the present invention provides strong technical support for the manufacture of electronic components with its innovation, practicality and economy.

[0026] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a schematic structural diagram of a needle-shaped tool for removing excess matter from the chip surface in Example 1;

[0029] Figure 2 Schematic diagram of the structure of the pipe sleeve in Example 1;

[0030] Figure 3 Schematic diagram of the structure of the piston rod in Example 1;

[0031] Figure 4 Schematic diagram of the structure of the needle in Example 1;

[0032] Figure 5 This is a schematic structural diagram of a needle-shaped tool for removing excess matter from the chip surface in Example 2;

[0033] Figure 6 Schematic diagram of the structure of the needle in Example 2.

[0034] Figure numerals: 1-tube sleeve, 11-nipple, 12-tube body, 2-piston rod, 21-rubber piston body, 22-piston shaft, 23-piston handle, 3-needle head, 31-needle stem, 32-needle plug, 4-filament, 5-air vent. DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the features in the following embodiments and embodiments can be combined with each other without conflict.

[0036] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0037] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] Electronic components require removal of excess material before and after chip placement and bonding. During this process, gold wire or other metal tools can easily damage the chip or bonding wire, rendering the product scrapped. To address this issue, the present invention provides a needle-shaped tool for removing excess material from the surface of chips and bonding wires.

[0039] Example 1

[0040] See also Figures 1 to 4 , is a needle-shaped tool for removing excess matter from the surface of a chip, comprising a sleeve 1, a piston rod 2, a needle 3, and a filament 4. The needle 3 is detachably connected to one end of the sleeve 1, and the piston rod 2 is slidably inserted into the sleeve 1 from the end of the sleeve 1 away from the needle 3 to form a syringe-like structure;

[0041] One end of the filament 4 is inserted from the needle 3 and passes through the tail end of the sleeve 1 , and is fixed under the clamping action of the piston rod 2 and the sleeve 1 .

[0042] Furthermore, the sleeve 1 includes a tube body 12 and a nipple 11 arranged at one end thereof, the piston rod 2 includes a piston shaft 22 and a rubber piston body 21 and a piston handle 23 respectively arranged at both ends of the piston shaft 22, and the needle 3 includes a needle bolt 32 and a needle stem 31 fixedly connected to the needle bolt 32;

[0043] Among them, the needle bolt 32 is sleeved on the nipple 11 to connect the needle 3 to one end of the tube sleeve 1, and one end of the rubber piston body 21 arranged on the piston rod 2 is inserted into the end of the tube sleeve 1 away from the nipple 11, and the piston rod 2 is pushed to make axial reciprocating movement by holding the piston handle 23.

[0044] The filament 4 is made of polyamide and its length should be enough to at least pass through the needle tip of the needle stem to the inside of the tube sleeve. Preferably, the length of the filament 4 is best enough to pass through the end of the tube sleeve away from the needle tip of the needle stem to facilitate the insertion of the piston rod 2 and the control of the filament 4.

[0045] Preferably, the polyamide filaments must have a certain degree of softness, and no fine fiber particles fall off after cutting, and the diameter of the filaments must be about 90 μm.

[0046] Preferably, after the filament passes through the needle 3 and the sleeve 1, the needle can be appropriately clamped so that the filament cannot move freely without external interference, and the filament can be manually pulled and the position of the filament can be clamped by the rubber piston body 21. The rubber piston body 21 can prevent the shape of the filament from being damaged and can better clamp its position.

[0047] Furthermore, the nipple 11 and the rubber piston body 21 are both tapered toward the needle, and the outer diameter of the rubber piston body 21 matches the inner diameter of the nipple 11, so that the rubber piston body 21 is combined in a conical surface in the inner cavity of the nipple 11 to better fix the filament.

[0048] Furthermore, in this embodiment, the needle stem 31 in the needle head 3 is a straight needle stem, so that the filament 4 is straight as a whole.

[0049] Specifically, the tools used in the process of removing excess materials must not damage the chip or other functional components in the device cavity. They must also work under a high-power microscope and in complex cavities. The tool design has the following requirements:

[0050] 1. To cope with the working environment, the needle 3 used in the tool should correspond to the thickness of the filament. The diameter of the filament 3 is about 90μm, and a needle of about 32G is used. The diameter of the filament 3 is slightly smaller than the inner diameter of the needle stem 31 in the needle, so that the filament can be normally penetrated. The filament 4 cannot be too hard or too soft, so as not to damage the chip and bonding wire, and no fine fiber particles will fall off after cutting. Therefore, the material of the filament 4 is polyamide;

[0051] 2. To facilitate holding, the size of the tube 12 as the tool's outer shape should not exceed approximately 0.5 cm.

[0052] 3. To facilitate the extraction of the piston rod 2, a vent hole 5 is provided at the location of the tube body 12 near the nipple 11 to prevent the piston rod from being unable to be pulled out due to vacuum, thereby affecting the position of the filament 1 in the needle.

[0053] 4. Because the needle 3 needs to work under a high-power microscope and in a complex lumen, the length of the needle stem 31 in the needle 3 is controlled to be 1-1.5 cm. If special requirements are met, the length can be appropriately extended.

[0054] Example 2

[0055] See also Figures 5 and 6The difference between this embodiment and embodiment 1 is that in this embodiment, the needle stem 31 in the needle head 3 is a bent needle stem, so that the direction of the filament can be adjusted to adapt to different working conditions.

[0056] Example 3

[0057] This embodiment provides a method for using a needle-shaped tool for removing excess material from a chip surface. The needle-shaped tool for removing excess material from a chip surface described in Example 1 or Example 2 is used. The specific method is as follows:

[0058] First, the needle 3 is installed on the nipple 11 of the sleeve 1 through the needle bolt 32. Then, the filament 4 is inserted into the needle and the sleeve 1 from the end of the needle 3 away from the sleeve 1, and then passes through the sleeve 1 from the end away from the needle 3. The end of the sleeve 1 away from the needle 3 leaves a bare filament for removing excess materials on the chip surface.

[0059] Then, one end of the piston rod 2 with the rubber piston body 21 is inserted into the sleeve from the end of the sleeve away from the nipple 11, and the end of the sleeve 1 close to the nipple 11 is pressed against the inner wall of the sleeve 1 to fix the position of the filament, and then the sleeve is held by hand to remove excess materials on the chip surface through the filament exposed outside the needle.

[0060] Specifically, when inserting the piston rod 2, the operator can fix one end of the filament away from the needle and then insert the piston rod 2 into the tube sleeve 1 to prevent the rubber piston body 21 from moving the filament toward the needle during the movement.

[0061] Furthermore, the needle stem 31 in the needle head 3 is clamped and flattened, so that the filament 4 cannot move freely without external force, thereby further fixing the position of the filament.

[0062] Furthermore, in the process of removing excess material from the chip surface, when the length of the filament exposed outside the needle is not enough to remove the excess material from the chip surface (or after the filament is cut by a blade), the piston rod 2 is controlled to move toward the end away from the nipple 11 to loosen the clamping of the filament by the rubber piston body 21 and the inner wall of the sleeve, and then the filament is manually pulled so that the filament is exposed to a length that can be used to remove excess material from the chip surface, and then the piston rod 2 is controlled to move toward the end close to the nipple 11 to re-clamp the filament 4 to fix the position of the filament.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A needle-shaped tool for removing excess material from the surface of a chip, characterized in that: It comprises a tube sleeve, a piston rod, a needle and a filament, wherein the needle is detachably connected to one end of the tube sleeve, and the piston rod is slidably inserted into the tube sleeve from the end of the tube sleeve away from the needle; One end of the filament is inserted from the needle head, penetrates into the interior of the tube sleeve, and is fixed under the clamping action of the piston rod and the tube sleeve.

2. The needle-shaped tool for removing excess material from the chip surface according to claim 1, characterized in that: The sleeve includes a tube body and a nipple arranged at one end thereof, the piston rod includes a piston shaft and a rubber piston body and a piston handle respectively arranged at both ends of the piston shaft, and the needle includes a needle bolt and a needle stem fixedly connected to the needle bolt; The needle bolt sleeve is arranged on the nipple to connect the needle to one end of the sleeve, one end of the piston rod arranged with a rubber piston body is inserted into the end of the sleeve away from the nipple, and the piston rod is pushed by the piston handle to make axial reciprocating movement.

3. The needle-shaped tool for removing excess material from the chip surface according to claim 2, characterized in that: The filament is made of polyamide material, and its length should be enough to at least penetrate from the needle tip of the needle stem to the inside of the tube sleeve.

4. The needle-shaped tool for removing excess material from the chip surface according to claim 3, characterized in that: The length of the filament is sufficient to pass through the end of the tube sleeve away from the needle tip of the needle stem, so as to facilitate the insertion of the piston rod and the control of the filament.

5. The needle-shaped tool for removing excess material from the chip surface according to claim 2, characterized in that: A ventilation hole is arranged at the position of the tube body close to the nipple.

6. The needle-shaped tool for removing excess material from the chip surface according to claim 2, characterized in that: The size of the tube does not exceed φ0.5cm.

7. The needle-shaped tool for removing excess material from the chip surface according to claim 2, characterized in that: The specification of the needle is 32G, and the length of the needle stem is 1 to 1.5 cm, and the needle stem is straight or curved.

8. The needle-shaped tool for removing excess matter from the chip surface according to claim 1, characterized in that: The diameter of the filaments was 90 μm.

9. A method for using a needle-shaped tool for removing excess material from a chip surface, characterized in that: The needle-shaped tool for removing excess material from the chip surface according to any one of claims 1 to 8 is used, and the specific method of use is as follows: First, the needle is mounted on the tube sleeve, and then the filament is passed through the needle and the tube sleeve from the end of the needle away from the tube sleeve, and passes out of the tube sleeve through the end of the tube sleeve away from the needle, and a bare filament is left at the end of the needle away from the tube sleeve for removing excess materials on the chip surface; Then insert one end of the piston rod into the sleeve from the end of the sleeve away from the needle, and press the inner wall of the sleeve at the end of the sleeve close to the needle to fix the position of the filament, and then hold the sleeve to remove excess material on the chip surface through the exposed filament.

10. The method for using the needle-shaped tool for removing excess matter from the chip surface according to claim 9, characterized in that: Flattening the needle stem in the needle head so that the filament cannot move freely without external force, so as to further fix the position of the filament; In the process of removing excess material from the chip surface, when the length of the exposed filament is insufficient to remove the excess material from the chip surface, the piston rod is controlled to move toward the side away from the needle to loosen the clamping of the piston rod and the inner wall of the sleeve on the filament, and then the filament is manually pulled so that the length of the exposed filament reaches a length that can be used to remove excess material from the chip surface, and then the piston rod is controlled to move toward the end close to the needle to re-clamp the filament to fix the position of the filament.

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