SMTA Officers
San Diego
President
Mumtaz Bora
Vice President
Greg Balas
Secretary
Julie Bradbury-Bennett
Treasurer
Peter Dunworth
Membership
Tom Wittmer
NEXT
MEETING
Wednesday
Mar 11, 2009
5:30 – 6 PM Social Hour
6 -7 PM Dinner
7-8:00PM...
More
SMTA Officers
San Diego
President
Mumtaz Bora
Vice President
Greg Balas
Secretary
Julie Bradbury-Bennett
Treasurer
Peter Dunworth
Membership
Tom Wittmer
NEXT
MEETING
Wednesday
Mar 11, 2009
5:30 – 6 PM Social Hour
6 -7 PM Dinner
7-8:00PM Presentation
Qualcomm Inc.
5525 Morehouse Drive
San Diego CA 92121
Cost:
Members: $15
Non-Members: $25
Info: www.
smta.
org
Mumtaz Bora
(619) 253-2973
this issue
Overview March 11 Meeting P.
1
Wrap-up of Feb 10 Meeting P.
2
SMTAI is Coming to San Diego P.
4
IS SUE
MA R 20 09
08 SMTASanDiego
As pitches become tighter (0.
4mm
and below) to enable increasing
miniaturization, the corresponding
PCB pads & stencil apertures (an
therefore area ratios) get smaller.
This makes it more difficult to transfer
consistent solder paste deposits from
the stencil to the board.
Inconsistent/
minimal paste volumes causes headin-pillow defects as well as clumpy
solder joints during reflow.
These
problems could get
Less
