Cutting by use of rotating axially moving tool – Processes – Bit detachable
Reexamination Certificate
2006-08-29
2006-08-29
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Processes
Bit detachable
C219S121710, C700S121000, C408S003000, C408S704000
Reexamination Certificate
active
07097394
ABSTRACT:
In the process of forming a through-hole or blind-hole at desired positions of a the substrate material, the present invention sets a drilling target position for each hole and a plurality of auxiliary drilling positions at a periphery of the drilling target position, and performs a plurality of drillings at the drilling target position and the plurality of auxiliary drilling positions. In another preferred embodiment of the present invention, a plurality of drillings are performed only at the auxiliary drilling positions per one hole at the desired position. According to the present invention, through-holes or blind-holes having several sizes of diameters can be formed by using one drilling jig under a single drilling condition. Accordingly, it is possible to efficiently produce circuit boards at low costs.
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Kimura Tadao
Nishii Toshihiro
Yamaji Hiroshi
Howell Daniel W.
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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