Manufacturing apparatus for printed boards, manufacturing method of printed boards and the printed board
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
May 2, 2002
app pub date -
Nov 20, 2001
filing date -
May 27, 1999
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The object is to provide a printed board manufacturing apparatus, printed board manufacturing method and a printed board produced thereby, in which stepwise exposures of an original photomask can be performed with an improved production yield by taking into account identification markings. In a stepwise exposure apparatus `A` for performing the exposure step for a printed board substrate (2) in which an original mask (3) having an wiring pattern area (3a) and identification marking areas (3c1) to (3c3) around the wiring pattern area (3a) is exposed stepwise a plurality of times to the printed board substrate (2) while shifting successively the site to be exposed, original mask (3) is arranged to face the printed board substrate (2) surface to be exposed; an opaque masking element (4) is disposed on one side of the original mask (3) on the other side of which disposed is the printed board substrate (2); and the opaque masking element (4) selectively masks identification marking areas (3c1) to (3c3) of the original mask (3).
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Cited Art Landscape
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