We use AiTechnology epoxy, too. ________________________________ From: Yuan-chia Joyce Koo <[log in to unmask]> Date: 27 February 2018 at 5:17:42 AM SGT To: [log in to unmask] <[log in to unmask]> Subject: Re: [TN] Conductive Epoxy Inspection Criteria on Flex for LED besides the name mentioned, I like AiTechnology. a bit pricy but great product for both conductive and non-conductive... (money well spend for consistency and quality... IMHO... you might have to fight with your penny pinch program MGR). On Feb 26, 2018, at 11:21 AM, Stadem, Richard D wrote: > I can also speak for Zymet; I am currently using both its thermally > conductive and electrically conductive epoxies at three different > companies. Zymet makes an excellent product; it is extremely > consistent from lot to lot. For automated dispensing, you need to > understand the pot life, just as you would for any other dispensed > epoxy, especially for SMT chipbonders. For extremely precise > dispensing, the pot life may only be 10 hours before the changes in > viscosity cause variations in the dispensed amount, but you can use > up the rest of the tube after 10 hours and before its real pot life > of 48 hours expires by dispensing manually, such as for touchup, etc. > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Showers > Sent: Monday, February 26, 2018 9:52 AM > To: [log in to unmask] > Subject: Re: [TN] Conductive Epoxy Inspection Criteria on Flex for LED > > Although I am usually middle of the pack for efficacy of 3-D paste > inspection, it is critical when applying conductive epoxies. The > criteria that I am aware of or have utilized are as follows: > IPC-3406 > IPC-3407 > > Before assessing visual criteria, I must first re-affirm Yuan-chia > Joyce Koo's position that HALT is essential to process verification. > Normal prohibitions aside (do not use on a HAL (Hot-Air Lead-Free) > or HASL (Hot-Air Solder (Tin-Lead) Level)), then the ideal is to > make sure that the parts are not mashed into the epoxy. The best > results I have achieved are with the epoxy compressed roughly 1/4 > to 1/3, with 2/3 to 3/4 of the epoxy bond under the part terminations > > Also, make sure your stencil house has epoxy experience as they > will fabricate the stencil to different guidelines. > > Also, two past resources for me were Zymet and Parker Chomerics. I > have used conductive epoxies from both and they were helpful. > Master bond also offers conductive epoxies but I cannot vouch for > their tech support.