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Compaq U.S. had three sources of PCA's. Compaq U.S.
manufactured PCA's itself. In addition, Compaq U.S. purchased
PCA's from Compaq Asia and from various unrelated PCA
subcontractors (unrelated subcontractors) that were primarily
located in the United States. Approximately half of the Compaq
U.S. 1991 through 1992 PCA requirements were manufactured by
Compaq U.S. or purchased from unrelated subcontractors, and the
other half were manufactured by Compaq Asia.
PCA Technology
PCA's are characterized by the types of components placed on
the printed circuit board. Components are attached to the board
through soldering, and components soldered to the surface of the
printed circuit board are known as "surface-mount" (SMT)
components. Components having leads that are inserted through
holes in the printed circuit board and then soldered to the board
are "through hole" components. PCA's containing only surface-
mount components are known as SMT PCA's, and PCA's containing
only through hole components are known as "through hole" PCA's.
PCA's that use both through hole and SMT components are known as
"mixed technology" PCA's.
Although SMT components are generally smaller than their
through hole counterparts, there is no functional difference
between them. The SMT process, however, is the newer process and
packs components densely on both sides of the printed circuit
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Last modified: May 25, 2011