Electronics Forum | Thu May 29 17:19:51 EDT 2008 | dyoungquist
On 0402s we use 20x25 mil pads with a 15 mil gap between the pads on the pcb with ENIG finish, 5 mil stencil with a 1:1 aperture (20x25 mil) and SAC305 lead free solder paste. We very rarely see any tombstoning on 0402s using this setup.
Electronics Forum | Mon Dec 27 05:16:17 EST 2021 | jineshjpr
Hi Stephen, Thanks for your response. Since the OSP Finished PCB to be execute in mass volume, almost 3 to 4 weeks (Vacuum Sealed Pack) takes place prior to assemble. Although we are using SnPb 63-37 Type 4 solder paste for this single sided SMD asse
Electronics Forum | Sun Dec 25 09:51:54 EST 2022 | msirifat
Hello, We use OSP-finished PCB. One component (transformer) will be delayed (approximately 4 months) to getting in our hands. We want to partially complete the PCBA (both SMT & MI) in the meantime and later insert the transformer upon arrival thr
Electronics Forum | Fri Aug 30 04:44:31 EDT 2002 | jason
Hi Dave, Why does it become " a bear" if u leave it unsoldered ?? Does it oxidise or something ?? Question (1): Does Ag imm. PCB need to use Solder paste with AG ?? If yes, why. Question (2): Does Ag imm pcb have poorer surface finishes than HAS
Electronics Forum | Thu Nov 21 11:49:31 EST 2002 | V.RAMANAND KINI
Thank you for this information. I will try this. Infact i am already working on this type of idea. In the mean time, I did try the traditional HAL finish on PCB since it can reflect the light to some extent. I am also trying lacquers peters white s/
Electronics Forum | Thu Apr 20 05:35:25 EDT 2000 | Keith Stone
Hi Pete We have a Black and Decker Power File and have mounted it on a bench in an enclosure to capture the hazardous dust. We used a hopper (usually used for guttering!) with a wire mesh over the top (static reasons) mounted in the bench top inside
Electronics Forum | Tue Feb 01 21:51:05 EST 2000 | Dave F
Roni: Ron gives good advice on the thickness of your Electroless Nickel - Immersion Gold (ENIG) solderability preservative. Several additional comments are ENIG: � More expensive than OSPs and HASL. � Much flatter surface than HASL, similar to OSP
Electronics Forum | Tue Jan 04 15:38:19 EST 2000 | Pat Pepper
Hi everyone: Our company is trying out immersion white tin for fine pitch assembly with what I would call mixed results. Reflow solder looks very good, but wave solder looks somewhat grainy (this may not be a problem in actuality). We had dewettin
Electronics Forum | Fri Jan 14 08:05:23 EST 2000 | Pat Pepper
Hi Dave, Thank you for the response. In answer to your responses I'll use the original numbers of my questions. 1. We would like to turn around our boards fast, but sometimes due to the market conditions we wind up with inventory. After reading
Electronics Forum | Thu Jan 16 05:42:18 EST 2003 | nifhail
I've a query. I have one new Customer whom insisted us to use RMA paste on their product. The problem is, on some of their products they use via hole as the test point in where all the PCB finished are ENTEK and as usual I have to print solder paste
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