Method f or printing ripping blue glue on gold finger tin-spraying plate
A gold finger and blue glue technology, applied in the secondary processing of printed circuits, coating of non-metallic protective layers, and the formation of electrical connection of printed components, etc., can solve the problems of scrapped boards, cumbersome processes, and low efficiency.
Active Publication Date: 2009-07-29
深圳市航盛电路科技股份有限公司
View PDF0 Cites 9 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to the high price of gold, currently more memory is replaced by tin plating. Since the 1990s, tin materials have become popular. At present, the "gold fingers" of motherboards, memory and graphics cards are almost all used. Tin material, only some parts of high-performance servers / workstations will continue to use gold-plated contact points, and the price is naturally expensive
[0003] In the prior art, red glue needs to be pasted on the gold finger before HASL, but the unit price of red glue is very high, and red glue needs to be pasted manually, resulting in cumbersome process and low efficiency; or before HASL, by using 18T Screen or aluminum sheet printing peelable blue glue, when using 18T screen printing peelable blue glue, the same side needs to be printed twice to ensure that the blue glue reaches about 0.2mm, and imported peelable blue glue is required, although imported blue glue is resistant to high temperature The thermal shock performance is good, but the unit price of imported peelable blue glue is high, which is several times higher than the price of domestic peelable blue glue; when printing peelable blue glue with aluminum sheet, the aluminum sheet is easy to deform and cause printing deviation, and the peelable blue glue is printed once. The thickness is difficult to reach 0.2mm. When the HASL is subjected to high temperature thermal shock, the gold finger is easy to be tinned and the board is scrapped.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] refer to figure 1 , figure 1 It is a schematic flow chart of the method for printing peelable blue glue on gold finger HASL according to the present invention. In this embodiment, the method includes the following steps:
[0019] Step 10. Use the copper clad core board to make the screen.
[0020] The copper-clad core board is a common material purchased by the company.
[0021] The step 10 includes: firstly, making a gong belt according to the external dimensions of the gold fingers and the distance between two adjacent gold fingers; secondly, making corresponding copper clad core boards according to the cutting size of different gold finger boards , the cutting size of different gold finger boards is different, and different gold fingers need to make different screens, the thickness of the copper clad core board is 0.5 mm, and the size of...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| Thickness | aaaaa | aaaaa |
| Thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method for printing strippable blue glue on gold finger tin spraying plate, which comprises making half-tone screen using copper covering core plate; and printing strippable blue glue on gold finger tin spraying plate by the half-tone screen. The invention can adopt common domestic blue glue, has convenient operation, causes no deformation to copper covering plate, achieves the one-time printing thickness of 0.4mm, and increase work efficiency.
Description
【Technical field】 [0001] The invention relates to a method for printing peelable blue glue on a gold finger spray tin plate, in particular to a method for making screen printing peelable blue glue on a gold finger spray tin plate with a copper-clad core board. 【Background technique】 [0002] The connecting finger is the connecting part between the memory stick and the memory slot, and all signals are transmitted through the connecting finger. Gold fingers are composed of many golden-yellow conductive contacts. Because the surface is gold-plated and the conductive contacts are arranged like fingers, they are called "gold fingers". Gold fingers are actually coated with a layer of gold on the copper clad laminate through a special process, because gold has strong oxidation resistance and strong conductivity. However, due to the high price of gold, currently more memory is replaced by tin plating. Since the 1990s, tin materials have become popular. At present, the "gold fingers...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H05K3/40H05K3/28
Inventor 唐雪冰
Owner 深圳市航盛电路科技股份有限公司