Judy
From what I understand, and that is not a lot, hook is when
Er changes with frequency at low frequencies, which changes
the capacitance, which results in distortion of output signals.
If anyone has any other information about this phenomenon,
please enlighten us.
Kaye
At 03:36 PM 4/27/2005, Judy Brown wrote:
>What is a "hook problem"?
>
> Judy
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Kaye Clayo
>Sent: Wednesday, April 27, 2005 12:10 PM
>To: [log in to unmask]
>Subject: [TN] How to Bake FR4 Boards
>
>Dear Technet:
>
>Can someone tell me what temperature and duration
>we should bake some unpopulated FR4 (HASL) boards?
>
>We are attempting an experiment to see if we can "bake" a
>potential problem out of certain boards, but we don't know
>what the baking temperature / time should be. The potential
>problem we are looking to bake out is under cured laminate
>which could be causing a hook problem.
>
>Please help.
>
>Kaye
>
>
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