Pr.
I agree with some of the above responses. if you are seeing Delam issues with incoming PCB's the following should be check.
1) Check the OEM Print to what Material they are calling out to be manufactured with.
2) If they are calling out for Standard FR4 but do not give the TG they are looking for, I hate to say this but assume the board house is using 130 Tg. due to its Cost. And they would still be suppling to Print. The OEM or Assembly house should be calling out What TG or what process the boards will be going through expecially if it is for Lead free assembly.
3) If they are calling out for Lead free assembly do not just focus on TG, Higher TG does not always mean that it will withstand the New Lead free Temps. You need to focus on T260 & T288 ratings, this will tell you how long the material can handle Temps of 260c & 288c.
Our Shop Uses as a Standard Material FR406 170 TG. Leaded assemblies. and IS410 180tg for Lead Free assembly. Both are products of ISOLA. We are also looking at Polyclad 370turbo HR.
Please feel free to contact me if you have any further questions.
Regards,
Mike Dupont Sales Manager Circuit Science, Inc. 763-559-9515 Tel 763-559-2569 Fax. miked@circuitscience.com www.circuitscience.com
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