Industry Directory | Consultant / Service Provider / Distributor / Manufacturer / Other
Ludee Circuits offer RoHS PCB.We could offer leadfree HASL,Entek, flash gold, immersion gold, immersion silver, immersion tin finishing based on standard FR-4, CEM-3 materials, Teflon, Rogers RO4000 series, as well as high Tg S1170 materials.
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Professional, Reliable,High Quality,Low Cost, Rapid Delivery PCB manufacturer
New Equipment | Fabrication Services
Minimum line width/space: 4mils Surface finish: immersion gold Board thickness: 1.20MM Minimum drilled hole diameter: 8mils Copper thickness: 0.5oz Special process : 0.40MM BGA , golden fingers
Layer Count: 2L Board Thickness: 0.8mm Dimension: 140*85mm Material: Rogers RO5880 Surface Copper: 35μm Min Hole Diameter: 2.0mm Min line Width/Space: N/A Surface Finish: ENIG Do you need a PCB for special signal requirement into your products? High
Electronics Forum | Thu Aug 06 13:18:30 EDT 1998 | Bob Willis
| | Is there any problem using SMT on gold boards? 15 years ago we were told not to use gold boards, but I can't remember why. Judging by the other postings it now appears to be common. Only problem I see is that the nickel should be plated, not e
Electronics Forum | Sat Jan 06 10:27:07 EST 2001 | Dave F
This is a very timely topic, as we drift [buffeted by the combined wind of everyone down-stream in the supply chain ] on waves carrying all of us from the land of lead to the land of no-lead. I want to say there was a recent trade journal article pu
Technical Library | 2018-07-11 22:46:13.0
For a demanding automotive electronics assembly, a highly thermal fatigue resistant solder alloy is required, which makes the lead-free Sn-Ag-Cu type solder alloy unusable. Sn-Ag-Bi-In solder alloy is considered as a high reliability solder alloy due to significant improvement in thermal fatigue resistance as compared to a standard Sn-Ag-Cu alloy. The alloy has not only good thermal fatigue properties but it also has superior ductility and tensile strength by appropriate addition of In; however, initial results indicated a sub-par performance in joint reliability when it is soldered on a printed circuit board (PCB) with Electroless Nickel Immersion Gold (ENIG) surface finish. Numerous experiments were performed to find out appropriate alloying element which would help improve the performance on ENIG PCBs. Sn-Ag-Bi-In solder alloys with and without Cu additions were prepared and then tests were carried out to see the performance in a thermal fatigue test and a drop resistance test.to investigate the impact of Cu addition towards the improvement of joint reliability on ENIG finish PCB. Also, the mechanism of such improvement is documented.
SMTnet Express, November 25, 2015, Subscribers: 23,782, Members: Companies: 14,767, Users: 39,402 Study of Various PCBA Surface Finishes Georgie Thein, David Geiger, and Murad Kurwa.; Flextronics International In this study various printed circuit
Surface Mount Technology Association (SMTA) | https://www.smta.org/knowledge/proceedings_abstract.cfm?PROC_ID=5255
today’s lead-free soldering applications. A series of soldering dissolution experiments, modeled on Bader’s, were conducted using SAC305 solder with gold, silver, palladium, platinum, copper and nickel samples
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/resource-center/solder-selection-guide
. Solderability Matrix Finish RMA RA WS NC High activity WS Aluminum Beryllium Copper Brass Bronze Cadmium Chromium Non-solderable Copper Galvanized Steel Gold Kovar Magnesium Non-solderable Mild Steel
