Title:
DRILLING METHOD FOR PRINTED CIRCUIT BOARD AND DRILL
Document Type and Number:
Japanese Patent JP2002052494
Kind Code:
A
Abstract:
To solve a problem of consuming a burr prevention sheet having a same size as a circuit board per each printed circuit board so as to produce a lot of sheet material wastes in manufacturing the printed circuit.
The printed circuit board 1 is continuously drilled by a drill 7, while the belt-shaped burr prevention sheet 3 put on the printed circuit board 1 is intermittently carried at prescribed pitches relative to the drilling position of the printed circuit board 1 by the drill 7. This method can drastically improve the using efficiency of the burr prevention sheet material so as to drastically reduce the sheet material wastes and be expected of the reduction effect of the manufacturing cost.
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Inventors:
YAMADA KOICHI
Application Number:
JP2000238741A
Publication Date:
February 19, 2002
Filing Date:
August 07, 2000
Export Citation:
Assignee:
TOSHIBA CHEM CORP
International Classes:
B23B35/00; B23B41/00; B23K26/382; B26F1/00; B26F1/16; H05K3/00; H05K3/46; B23K101/42; (IPC1-7): B26F1/16; B23B35/00; B23B41/00; B23K26/00; B26F1/00; H05K3/00; H05K3/46
Attorney, Agent or Firm:
Suyama Saichi