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September 1999

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Subject:
From:
"Deakin, Roger" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 13 Sep 1999 14:54:18 +0100
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HI ALL !!!!
I HAVE A BACKPLANE WITH 14 LAYERS. THE PANEL IS 6.8mm THICK.

IPC CAT 3 REQUIRES 75% FILL ON PECS WHICH ARE UP TO 3.8mm THICK ?

MY QUESTION IS, WHAT DICTATES THE REASON FOR 75% FILL ? I WOULD LIKE
TO ACCEPT THE PANEL WITH ONLY 40% FILL. THIS WOULD STILL HAVE A
FILLET OF 2.72mm. WOULD THIS FAIL IPC-610 CAT 3 ?

Regards  -  Roger Deakin.

EMAIL           [log in to unmask]
TEL             +44 (0)1983 202632
FAX             +44 (0)1983 202106
COMPANY         BRITISH AEROSPACE  LAND AND SEA SYSTEMS
                NEWPORT ROAD
                COWES ISLE OF WIGHT
                PO31 8PF
                ENGLAND

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