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Article: Fine Lines in High Yield (Part LXVII): Horizontal vs. Vertical Processing.
- Article from:
- CircuiTree
- Article date:
- April 1, 2001
- Author:
CopyrightCOPYRIGHT 2001 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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It was at the Taiwan Printed Circuit Association (TPCA) Show in November 2000, in view of new vertical processing equipment on display, that a not-so-novel issue caught my imagination, namely the subject of the relative merit of horizontal vs. vertical processing in the fabrication of printed wiring boards.
At the root of the discussion is the issue of how to take advantage of, or minimize, the detrimental effect of gravity as it affects liquid flow, liquid accumulation, symmetry or asymmetries of mechanical or optical devices, heat convection, dust accumulation and material transport of thin sheets.
The smaller footprint of vertical equipment has always ...