Title:
V-SHAPED GROOVE FOR DIVIDING ORIGINAL PRINTED BOARD INTO INDIVIDUAL PIECES AND MILLING CUTTER TOOL FOR FORMING THE GROOVE
Document Type and Number:
Japanese Patent JP2002280677
Kind Code:
A
Abstract:
To provide a shape of groove capable of reducing man-hours required to remove burrs at a divided portion and producing a start point of dividing stably and surely, and to provide a milling cutter tool for forming the shape of groove.
A V-shaped groove which is made on a original a printed board to divide it into individual pieces is formed in a two-stepped V-shape of a first V-shaped groove formed on the bottom side and having an opening angle of 45° to 120° and a width of 0.03 mm to 0.15 mm and a second V-shaped groove following the first V-shaped groove and having an opening angle of 20° to 40°. The recess or the bottom of the first V-shaped groove becomes a start point of breakage.
Inventors:
TAKAOKA AKIHIKO
KAWAMURA SHIGEKI
MANTANI TETSURO
KAWAMURA SHIGEKI
MANTANI TETSURO
Application Number:
JP2001080197A
Publication Date:
September 27, 2002
Filing Date:
March 21, 2001
Export Citation:
Assignee:
SHODA TECHTRON CORP
KANEFUSA KNIFE & SAW
KANEFUSA KNIFE & SAW
International Classes:
B26D3/06; B23C5/10; B23C5/12; H05K1/02; H05K3/00; (IPC1-7): H05K1/02; B23C5/10; B23C5/12; B26D3/06; H05K3/00
Attorney, Agent or Firm:
Yumi Kato
Previous Patent: PRINTED WIRING BOARD FOR DRIVING CIRCUIT BOARD OF LIQUID CRYSTAL CELL
Next Patent: PRINTED WIRING BOARD
Next Patent: PRINTED WIRING BOARD