We use two methods.

1) peelable solder mask Techspray Wondermask P

2) holes with no plating through and about a 10 mil ring of no copper on the
inside diameter of the land.

-----Original Message-----
From: Ken Fong [mailto:[log in to unmask]]
Sent: Wednesday, January 17, 2001 12:48 AM
To: [log in to unmask]
Subject: [TN] Special through hole pad design


Technetters,
Could anyone advise a design of soldering pad which will not be closed with
solder during wavesoldering when the hole is not inserted with component,
but it
can form a normal solder joint when a component is inserted through the hole
with the lead clinched by auto-insertion machine? The board is 1.6mm thick
single sided pcb. Thanks.

Ken

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