Mail*Link(r) SMTP               FWD>>DES/FAB- hole wall thic

Susan and all, I apologize, I goofed when I didn't pre-read/edit my previous
response to Susan's inquiry.

In the table of sheet resistances, the last one was in error. The error for
the 190 micrometer Cu thickness was the 5 mils Cu should have been 2 mils Cu
which was the mentioned PTH Cu plating thickness Susan mentioned, and is
corrected in the complete table below.

 25 micrometer [1 millinch]   ~680 microhms/sq
 35 micrometer [1 oz/sqft Cu] ~485 microhms/sq
 50 micrometer [2 millinch]   ~340 microhms/sq
 70 micrometer [2 oz/sqft Cu] ~240 microhms/sq
140 micrometer [4 oz/sqft Cu] ~120 microhms/sq
190 micrometer [4 oz/sqft + 2 mils Cu] ~90 microhms/sq

Ralph Hersey
e-mail:  [log in to unmask]