Electronics Forum: chrys (Page 1 of 29)

uBGA (.5mm pitch) printing woes

Electronics Forum | Thu Sep 07 10:18:24 EDT 2017 | capse

Chrys Shea has published extensively on stencil materials, coatings and paste release mechanisms. Many of the papers are available to download on her website. Just search for Shea Engineering Services. I've worked with Chrys in the past, she is defin

SMT Stencil design

Electronics Forum | Tue Apr 21 21:49:26 EDT 2020 | SMTA-Samy

Why are you trying to overprint? Take some time to review this presentation by Chrys Shea titled SPECIFYING STENCILS TO OPTIMIZE PRINT PERFORMANCE. https://www.smta.org/chapters/files/Uppermidwest_Chrys_Shea_Presentation_Upper_Midwest_Expo.pdf

Re: BGA Profile

Electronics Forum | Wed Feb 24 14:12:31 EST 1999 | Dave F

I am profiling a BGA for the first time and I am seeing temperature flucuations on the ramp and cool down from the thermocouple I have placed through the pcb and under the component. I am using a 5 zone convection oven.Any suggestions on the plobl

Re: Perforated Tabs

Electronics Forum | Mon Jun 26 17:28:55 EDT 2000 | Mike Demos

Chrys & Dave: Thanks for your replies. Scoring won't work in this case. There are some overhanging components and some 90 degree routes as well. My experience with scoring has been similar to Chrys'. For large panels I also had some issues with

Re: library

Electronics Forum | Tue Jun 22 16:17:20 EDT 1999 | Cunli

Cunli: Chrys is not the only one. Check the following: "Lead Free Solders - A push in the wrong direction?" Dave, Thank you for letting me know. We will get in touch with the contributor right away to correct the entry. Looks like Chrys

Re: Conductive Adhesives

Electronics Forum | Tue Jan 05 21:21:52 EST 1999 | Dave des

Hi Chrys, any Tab tooling needs just call. Nice to talk tto you today, NEPCON is a maybe. Say Hi to Carlos.. Dave I'm looking for information on a company called AI Technologies. They make conductive adhesives and thermal management materials f

Re: BGA Profile

Electronics Forum | Thu Feb 25 10:17:44 EST 1999 | Joe Cameron

I second Dave's encouragement to use the archives. It's a wealth of info and the search engine usually get's me what I want the first time. By the way, Richard, are you soldering your thermocouple to a ball on the BGA with hi-temp solder? It'd hel

Re: Conductive Adhesives

Electronics Forum | Wed Jan 06 13:24:25 EST 1999 | Dave F

I'm looking for information on a company called AI Technologies. They make conductive adhesives and thermal management materials for attaching dice and heatsinks. Any feedback from users would be appreciated. Thanks, Chrys

Re: library

Electronics Forum | Tue Jun 22 15:42:26 EDT 1999 | Dave F

exactly how do you access posted library articles? Are you refering to the newest posting by Chrys Shea on wave soldering? Looks like she did not successfully post the article. We have emailed her on this, so hopefully you will be able to

Re: library

Electronics Forum | Wed Jun 23 13:08:09 EDT 1999 | Dave F

Cunli: Chrys is not the only one. Check the following: "Lead Free Solders - A push in the wrong direction?" Dave, Thank you for letting me know. We will get in touch with the contributor right away to correct the entry. Loo

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