阅读说明：本技术 一种散件cpu散热片连续电镀方法 (Continuous electroplating method for discrete CPU (central processing unit) radiating fins ) 是由 董其刚 李景颜 刘德虎 于 2021-09-25 设计创作，主要内容包括：一种散件CPU散热片连续电镀方法,涉及CPU散热片电镀装置技术领域,包括以下步骤：S1：卷盘开料,S2：产品装片,S3：上料,S4：除油,S5：活化,S6：预镀,S7：电镀,S8：脱水,S9：热水洗,S10：离水,S11：封孔,S12：烘干,S13：卷盘收料。本发明解决了传统技术装置中连续电镀工艺由于断点的漏镀,导致产品易氧化；以及挂镀形式的镀层不均、颜色差异、生产效率及成品良率低的问题。(A continuous electroplating method for a spare CPU (central processing unit) radiating fin relates to the technical field of CPU radiating fin electroplating devices and comprises the following steps: s1: reel cutting, S2: product mounting, S3: feeding, S4: oil removal, S5: activation, S6: pre-plating, S7: electroplating, S8: dehydration, S9: hot water washing, S10: free water, S11: hole sealing, S12: and (5) drying, S13: and (6) winding the reel for material collection. The invention solves the problem that the product is easy to oxidize due to plating leakage of the breakpoint in the continuous electroplating process in the traditional technical device; and the problems of uneven plating layer, color difference, low production efficiency and low yield of finished products in the rack plating mode.)

1. A continuous electroplating method for a discrete CPU heat sink is characterized by comprising the following steps: the method comprises the following steps: s1: reel cutting, S2: product mounting, S3: feeding, S4: oil removal, S5: activation, S6: pre-plating, S7: electroplating, S8: dehydration, S9: hot water washing, S10: free water, S11: hole sealing, S12: and (5) drying, S13: and (6) winding the reel for material collection.

2. The continuous plating method for the heat sink of the discrete CPU as claimed in claim 1, wherein: the product loading comprises a carrier strip piece (1), the starting end of the carrier strip piece (1) is wound on the reel for material collection, and the tail end of the carrier strip piece (1) is wound on the reel for material collection.

3. The continuous plating method for the heat sink of the discrete CPU as claimed in claim 2, wherein: the carrier tape piece (1) is provided with a plurality of mounting holes (12) in parallel along the extending direction, and a radiating fin is clamped in each mounting hole (12).

4. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 3, wherein: elastic pieces are fixedly connected to two opposite hole walls of the mounting hole (12) in the transverse direction, and fastening points (4) which are clamped against the side walls of the radiating fins are fixedly connected to the two elastic pieces.

5. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 4, wherein: the hole wall of the mounting hole in the transverse direction is also fixedly connected with two vertically arranged protection plates (5) in parallel, and the lower end part of each protection plate is connected with the hole wall of the mounting hole.

6. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 4, wherein: the elastic sheet comprises fixed sections (2), the two fixed sections (2) are arranged in a gradually expanding manner from top to bottom, and the buckling points (4) are fixedly connected to the opposite end faces of the fixed sections (2).

7. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 6, wherein: the upper end of the two fixed sections (2) is further fixedly connected with a leading-in section (3) which is arranged in a gradually expanding manner from bottom to top, and the lower end of the leading-in section (3) is connected with the hole wall of the mounting hole.

8. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 4, wherein: two connecting bridges arranged along the transverse direction are fixedly connected between two opposite hole walls of the mounting hole in the transverse direction.

9. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 8, wherein: the both ends of connecting the bridge are equipped with and are support section (7) that the formula of expanding gradually set up from bottom to top, the upper surface rigid coupling of support section (7) has along horizontal extending support arch (8).

10. The continuous plating method for the heat sink of the discrete CPU as set forth in claim 9, wherein: a connecting section (9) is fixedly connected between the lower end parts of the two supporting sections (7), and a pre-tightening frame (10) is further arranged in the middle of the connecting section (9).

Technical Field

The invention relates to the technical field of CPU (central processing unit) radiating fin electroplating devices, in particular to a continuous electroplating method for a discrete CPU radiating fin.

Background

With the improvement of IC packaging test production capacity in China, for chip design, packaging test and use manufacturers in China, the stability of a supply chain seriously influences the health and stable development of enterprises, so that semiconductor enterprises and technical enterprise leaders in the industry, such as Haesi, Hai-guang, Huatian, Chang-Feng and the like, have the requirement of domestic substitution of IC packaging test materials, wherein a CPU (Central processing Unit) cooling fin is a typical representative of the IC packaging test.

The requirement of localization brings a new round of technical innovation requirement, and the mode of making the product in the industry at present is as follows:

a continuous electroplating process: the product and the material belt are of a connected structure, the body position of the electroplating line is continuously plated, and the product electroplating process flow is as follows: reel cutting, feeding, deoiling, activating, pre-plating, electroplating, dehydrating, hot water washing, water separation, hole sealing, drying, reel receiving, product cutting (break point occurrence and plating leakage) packaging

The other rack plating process comprises the following steps: the product is a single-chip structure, the hanger is an electroplating carrier, the main form of the hanger is a cylinder, a flat plate, a grid, a hexahedron or a polyhedron, one hanger can be used for mounting a plurality of products, and after the hanger is filled with the products, the hanger carries out continuous electroplating along with the working sequence of the electroplating line body. The main electroplating process comprises the following steps: loading a product, loading, deoiling, activating, pre-plating, electroplating, dehydrating, washing with hot water, dehydrating, sealing holes, drying, unloading, taking out and packaging.

The problem with the continuous electroplating process is that the plating missing at the last break point can cause the product to be easily oxidized, thereby affecting the final performance and service life of the product.

The rack plating process has the problems of low production efficiency of products, poor automation degree, poor product consistency and high production cost.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a continuous electroplating method for a discrete CPU (central processing unit) radiating fin, which is used for solving the problem that a product is easy to oxidize due to plating leakage of a breakpoint in a continuous electroplating process in the prior art; and the problems of uneven plating layer, color difference, low production efficiency and low yield of finished products in the rack plating mode.

In order to achieve the purpose, the invention provides the following technical scheme:

a continuous electroplating method for a discrete CPU heat sink comprises the following steps: s1: reel cutting, S2: product mounting, S3: feeding, S4: oil removal, S5: activation, S6: pre-plating, S7: electroplating, S8: dehydration, S9: hot water washing, S10: free water, S11: hole sealing, S12: and (5) drying, S13: and (6) winding the reel for material collection.

Preferably, the loading of the product comprises a carrier strip, the start end of the carrier strip is wound on the reel to be fed, and the tail end of the carrier strip is wound on the reel to be fed.

As an optimized scheme, the carrier strip is provided with a plurality of mounting holes in parallel along the extension direction, and a radiating fin is clamped in each mounting hole.

As an optimized scheme, elastic pieces are fixedly connected to two transverse opposite hole walls of the mounting hole, and fastening points which are abutted and clamped with the side wall of the radiating fin are fixedly connected to the two elastic pieces.

As an optimized scheme, two vertically arranged protection plates are fixedly connected to the hole wall of the mounting hole in the transverse direction in parallel, and the lower end parts of the protection plates are connected with the hole wall of the mounting hole.

As an optimized scheme, the elastic sheet comprises fixed sections, the two fixed sections are arranged in a gradually expanding mode from top to bottom, and the buckling points are fixedly connected to the opposite end faces of the fixed sections.

As an optimized scheme, the upper end parts of the two fixing sections are further fixedly connected with a lead-in section which is arranged in a gradually expanding manner from bottom to top, and the lower end part of the lead-in section is connected with the hole wall of the mounting hole.

As an optimized scheme, two connecting bridges arranged along the transverse direction are fixedly connected between two opposite transverse hole walls of the mounting hole.

As an optimized scheme, two ends of the connecting bridge are provided with support sections which are arranged in a gradually expanding manner from bottom to top, and the upper surface of each support section is fixedly connected with a support bulge extending along the transverse direction.

As an optimized scheme, the cross section of the supporting protrusion is arranged in a triangular shape.

As an optimized scheme, a connecting section is fixedly connected between the lower end parts of the two supporting sections, and a pre-tightening frame is further arranged in the middle of the connecting section.

As an optimized scheme, the mounting hole is fixedly connected with a material blocking piece on the longitudinal opposite hole wall.

As an optimized scheme, the tape carrier piece is further provided with an auxiliary hole, and the auxiliary hole is connected with the fixing section.

As an optimized scheme, the carrying sheet is an SUS301 steel strip.

Compared with the prior art, the invention has the beneficial effects that:

the detachable split type arrangement between the carrier tape piece and the radiating fin is realized through the structural design of the carrier tape piece, and no material connecting point is arranged between the carrier tape piece and the radiating fin, so that the problem of plating leakage at the material connecting point due to the existence of the material connecting point in the traditional technology can be solved;

the protective plates are arranged on the carrier tape pieces in parallel, so that when the carrier tape pieces are wound, the carrier tape pieces in the same radial direction can be supported by the protective plates, the phenomenon that the radiating fins in the same radial direction are extruded and scratched is prevented, and the yield of products is ensured;

the invention solves the bottleneck problem in the prior industry, realizes high-speed continuous production, no plating leakage and high yield, and improves the electroplating technology of the products. Tests prove that the product has stable coating quality, reliable performance and high yield up to 99.5%. Therefore, the electroplating process scheme greatly improves the yield and the production efficiency of the products. The size, safety, consistency and appearance of the product exceed the parameter requirements of the current similar products;

the manufacturing cost is low, and the maintenance is convenient; the design is reasonable, and the matching among structures is precise; the operation is convenient and fast; the stability in the working process is improved; the parts are few, the working procedure is simple and convenient, and the failure rate is low; the structure is simple, and the service life is long; simple and convenient operation and control, easy large-scale manufacture and installation and wide application range.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a carrier strip of the present invention;

FIG. 3 is a schematic top view of a carrier sheet according to the present invention;

FIG. 4 is a schematic side view of a carrier tape sheet according to the present invention.

In the figure: 1-a tape carrier sheet; 2-a fixed segment; 3-a lead-in section; 4-buckling points; 5-protecting the sheet; 6-material blocking piece; 7-a support section; 8-supporting protrusions; 9-a connecting segment; 10-pre-tightening frame; 11-auxiliary wells; 12-mounting holes; 13-small hole.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 4, the method for continuously electroplating the heat sink of the discrete CPU comprises the following steps: s1: reel cutting, S2: product mounting, S3: feeding, S4: oil removal, S5: activation, S6: pre-plating, S7: electroplating, S8: dehydration, S9: hot water washing, S10: free water, S11: hole sealing, S12: and (5) drying, S13: and (6) winding the reel for material collection.

At S13: after the reel receives the material, there is also S14: automatic pickup, S15: and (6) packaging.

Different from common continuous electroplating, because the existence of the hanging points during electroplating causes that when the hanging points are cut off after electroplating, the plating leakage of products is easy to oxidize. Meanwhile, the process is also different from a continuous rack plating process without continuous material points, the continuous rack plating needs a special rack for dip plating production, and products at different rack positions are subjected to different current densities, so that the problems of poor electroplating consistency, poor chromatic aberration and uneven plating are high.

The product loading comprises a carrier tape sheet 1, wherein the starting end of the carrier tape sheet 1 is wound on a reel to be fed, and the tail end of the carrier tape sheet 1 is wound on a reel to be fed.

The tape carrier 1 is provided with a plurality of mounting holes 12 in parallel along the extending direction, and a heat sink is clamped in each mounting hole 12.

Elastic pieces are fixedly connected to two opposite hole walls of the mounting hole 12 in the transverse direction, and fastening points 4 which are clamped against the side walls of the radiating fins are fixedly connected to the two elastic pieces.

The carrier strip 1 is an SUS301 steel strip, is manufactured by adopting a stamping process, and is in a continuous coil material form and has a narrow width and a long length. The thickness of the fastening point 4 is 0.3-0.4 mm.

The side walls of the radiating fins are in contact with each other in an abutting mode through the buckling points 4, wherein the buckling points 4 are in point contact with the radiating fins.

The elastic pieces can also be arranged on the longitudinal opposite hole walls of the mounting hole, and the two transverse elastic pieces and the two longitudinal elastic pieces are used for respectively abutting against the side walls of the radiating fins.

The hole wall of the mounting hole in the transverse direction is also fixedly connected with two vertically arranged protection plates 5 in parallel, and the lower end parts of the protection plates are connected with the hole wall of the mounting hole, so that the protection radiating fins are supported when the carrier plate 1 is wound.

The height of the protective sheet 5 is 4 mm.

The shell fragment includes canned paragraph 2, and two canned paragraph 2 are the formula that expands gradually by last under to and set up, and 4 rigid couplings of knot point utilize canned paragraph 2 to be the formula that expands gradually by last under to and set up on canned paragraph 2's relative terminal surface, can guarantee to block into the fastness of back fin, prevent to deviate from automatically.

The included angle between the fixed section 2 and the carrier tape sheet 1 is 115 degrees +/-2 degrees.

The upper end parts of the two fixed sections 2 are further fixedly connected with a lead-in section 3 which is arranged in a gradually expanding mode from bottom to top, the lower end part of the lead-in section 3 is connected with the hole wall of the mounting hole, guiding is achieved through the lead-in section 3, and the radiating fins can be conveniently clamped between the fixed sections 2.

Two connecting bridges arranged along the transverse direction are fixedly connected between two opposite hole walls of the mounting hole in the transverse direction together, so that the strength of the carrier tape sheet 1 is increased.

The both ends of connecting the bridge are equipped with and are the support section 7 that the formula of expanding gradually set up from bottom to top, and the upper surface rigid coupling of support section 7 has along the support arch 8 of horizontal extension, utilizes support arch 8 to realize supporting two corners that the fin is in the below.

The distance between the two ends of the supporting section 7 along the horizontal direction is 2.3 +/-0.15 mm.

The thickness of the support protrusions 8 is 0.4-0.5 mm.

The cross section of the supporting bulge 8 is triangular, so that point contact between the supporting bulge and the corner of the radiating fin is realized.

A connecting section 9 is fixedly connected between the lower end parts of the two supporting sections 7, and a pre-tightening frame 10 is further arranged in the middle of the connecting section 9, so that the tension of the mounting hole in the transverse direction is improved.

The width of the connecting section 9 is 1.0 +/-0.15 mm.

The mounting hole is fixedly connected with the material blocking piece 6 on the longitudinal opposite hole wall, so that the longitudinal direction of the radiating fin is limited, and the radiating fin is prevented from sliding and falling.

The distance between the opposite material blocking sheets 6 is 31.9 mm.

The tape carrier piece 1 is further provided with an auxiliary hole 11, and the auxiliary hole 11 is connected with the fixed section 2 to improve the elasticity of the fixed section 2.

The edge of the electroplating carrier tape piece is provided with a plane area of about 3-5mm, the thickness of the electroplating carrier tape piece is the thickness of the raw material and is arranged in a flat shape, and a plurality of small holes 13 are arranged in the middle position of the electroplating carrier tape piece and are used for step control and accurate guiding during the production of the carrier tape piece.

The assembling mode of the CPU radiating fin and the carrier tape piece is clamping type assembling, the distance between the radiating fin and the clamping jaw after assembling is less than 30% of the material thickness, and the clamping point contact point is positioned at the convex hull position, so that firm installation is ensured, separation is prevented, and automatic assembling can be preferably carried out to realize the assembling of the electroplating carrier tape piece and the CPU radiating fin.

And after the assembly is finished, the reel is used for coiling, so that the material storage space is saved, and the automatic feeding before the feeding is facilitated.

The CPU automatic assembly machine is provided with a clamping jaw peeling mechanism and a radiating fin taking and placing mechanism, so that the clamping jaws of the electroplating carrier tape sheet can be opened before the radiating fin is installed, the product automatically slides down under the action of gravity and falls on an installation area of the electroplating carrier tape sheet, then the clamping jaw peeling mechanism resets, the clamping jaws clamp the radiating fin, and non-contact assembly is completed.

The mechanical mechanisms involved in the above steps are the same as the common structures in the market, and the detailed description is omitted here because the specific structure does not belong to the innovation of the scheme.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.