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Mon, 10 Jul 1995 08:02:17 DST |
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id m0sVPsk-0000GmC; Mon, 10 Jul 95 15:56 CDT |
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| From [log in to unmask] Sat Apr 27 14: |
22:49 1996 |
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07:48 PSD, 7/10/95
ONE OF OUR OPERATORS LEFT A LOAD OF PCBs IN OUR SOLDER MASK CURING
OVEN FOR 40 HOURS AT 300F OVER THE WEEKEND. THEY ARE PCBs TO AN OLDER
INSTRUMENT FABRICATED WITH DIFUNCTIONAL FR4, .062 1/1. THEY ARE
SOLDER MASKED WITH PC401. THEY ARE SLIGHTLY DISCOLORED.
1) WILL THE PROPERTIES (ESPECIALLY ELECTRICAL, e.g. DIELECTRIC
CONSTANT, INSULATION RESISTANCE, DISSIPATION FACTOR, DIELECTRIC
BREAKDOWN VOLTAGE, ETC.) BE DEGRADED?
2) WILL A 40 HOUR BAKE AT 300F DEGRADE THE FIRE RETARDING PROPERTIES?
RESPONSE TO THIS IS URGENT. THANKS IN ADVANCE FOR ANY INFORMATION.
Fred Paul
FLUKE CORPORATION
POB 9090 M/S 55
EVERETT, WA 98206
VOICE MAIL: (206)356-5734
FAX: (206)356-6070
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