Techniques for arranging solder balls and forming bumps
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 22, 2011
Issued Date -
N/A
app pub date -
Aug 18, 2009
filing date -
May 15, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A mask having a plurality of through holes and a mold having a plurality of cavities are provided, and the through holes and the cavities are aligned. Conductive balls are dispensed into the aligned through holes and cavities. Substantially one ball is dispensed into each aligned through hole and cavity, and the mask with the holes and the cavities in the mold are configured and dimensioned such that the balls are substantially flush with, or recessed below, an outer surface of the mask. The mask is removed, the conductive balls are aligned with pads of a semiconductor device, and the conductive balls are transferred to the pads by fluxless reflow in a formic acid environment. Vibrational, electrostatic, and direct transfer aspects are also disclosed.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully