SMT Adhesive

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We have a need to bond Flatpack and Quadpack components to... - Oct 15, 1998 by

| We have a need to bond Flatpack and Quadpack components ... - Oct 15, 1998 by

Andrew

#13794

SMT Adhesive | 15 October, 1998

We have a need to bond Flatpack and Quadpack components to the circuit board. The adhesive should be quick curing, repairable and have a low modulus. It does not have to be thermally conductive (but it would be a plus). The components are currently soldered using paste/oven reflow. Does anyone have suggestions for an adhesive and process (pre-solder or post-solder application). Thanks. Andrew

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Christopher L.

#13795

Re: SMT Adhesive | 15 October, 1998

| We have a need to bond Flatpack and Quadpack components to the circuit board. The adhesive should be quick curing, repairable and have a low modulus. It does not have to be thermally conductive (but it would be a plus). The components are currently soldered using paste/oven reflow. | Does anyone have suggestions for an adhesive and process (pre-solder or post-solder application). | | Thanks. Andrew | Andrew, I have used Loktite chipbonder 360 in the past with very good results. It is in the 500 kps range, but I am not sure off hand of its thermal properties. This is a heat cured material. I use the standard adheasive dispenser on my Contact 3AV P&P to dispence prior to placement of the component. The adheasive cures at about 170 C.

Hope this helps. CL

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Scott McKee

#13796

Re: SMT Adhesive | 15 October, 1998

| We have a need to bond Flatpack and Quadpack components to the circuit board. The adhesive should be quick curing, repairable and have a low modulus. It does not have to be thermally conductive (but it would be a plus). The components are currently soldered using paste/oven reflow. | Does anyone have suggestions for an adhesive and process (pre-solder or post-solder application). | | Thanks. Andrew | I've used both the Loctite 3614 chipbonder and Heraeus PD955PY adhesive. Both work well but the Loctite requires their special cleaner where Heraeus is easy to clean with IPA. I use the Heraeus almost exclusively and cure at 120C (it can cure at lower temps - takes longer). I apply using both manually and with the printer. Of interest, I have a customer who is also looking for a thermally conductive single part epoxy as well so let me know if you find one that is printable.

Scott

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