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Reply To: | TechNet Mail Forum. |
Date: | Thu, 16 Oct 1997 08:46:55 -0600 |
Content-Type: | text/plain |
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HI,
WE HAVE AN ISSUE HERE THAT NEEDS SOME CLARIFICATION. WE'VE BEEN
BUILDING FIDUCIALS FOR 4 YEARS NOW THAT HAVE NOT HAD SOLDER PASTE ON
THEM (NO RELIEFS IN THE PASTE MASK). NOW OUR VENDORS, (YES THE SAME
ONES WHO HAVE BEEN BUILDING THE BOARDS FOR 4 YEARS), ARE SAYING THAT
THEY'VE ALWAYS PUT SOLDER PASTE ON THE FIDUCIALS. THE FIDUCIALS IN
QUESTION ARE GLOBAL BOARD FIDUCIALS.
MY QUESTIONS ARE;
1. WON'T THE SOLDER PASTE, (PRE-REFLOW), LACK CONTRAST/REFLECTIVITY?
2. WHAT PURPOSE DOES SOLDER PASTE SERVE ON THE FIDUCIAL?
THANKS,
ROB
ROBERT BUTTERWORTH
CAD DESIGN ENGINEER<-----WHAT THE HELL IS THIS?
ADC BROADBAND COMMUNICATIONS
11 FAIRFIELD BLVD
WALLINGFORD, CT 06492
203-630-5755
[log in to unmask]
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