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Date: | Tue, 12 May 1998 08:28:21 PDT |
Content-Type: | text/plain |
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Just thinking about your situation and some of the responses, I was wondering
how some of these limits have been established?
In relation to environmental testing, has anyone determined the acceleration
due to temperature? And, what is considered a failure? I was thinking this
should include below and above the glass transition temperature, even if it's
not a typical use environment.
Then one more twist, what about the influence of humidity?
Thanks is advance for any response.
Glenn Pelkey
Maxtek Components Corp.
| ----------
| From: Sam Mollet[SMTP:[log in to unmask]]
| Sent: Monday, 11 May, 1998 14:25
| To: [log in to unmask]
| Subject: [TN] Maximum FR4 operating temperature
|
|
| I have an application with a maximum ambient temperature of 70
| °C. I am using copper planes on FR4 to help cool some power resistor
| leads. The copper planes can hit 115 °C. Is this a problem? Is there
| a rule of thumb on how hot FR4 can continuously be operated at?
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