Migration is a fact of life and common to all bipolar transistor. See
my earlier post. It is intrinsic to the purity material used. IE:
Newer is better. It is not a manufacturing defect and is entirely
different than the purple plague.
It is the migration of minority carriers across a junction. IE. The
majority carriers migrate to the N-type material where they are minority
carriers. This degrades several of the transistors performance factors,
such as gain and frequency performance.
73
Roger (K8RI)
On 12/20/2015 Sunday 12:52 AM, Bill Turner wrote:
------------ ORIGINAL MESSAGE ------------(may be snipped)
On Sat, 19 Dec 2015 22:40:28 -0600, you wrote:
Migration is a real phenomenon but it's a quality defect, and not part of
the normal operation. Google "purple plague."
REPLY:
So, absent migration, do transistors "wear out"?
73, Bill W6WRT
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