Title:
PRINTED WIRING BOARD
Document Type and Number:
Japanese Patent JPH0637416
Kind Code:
A
Abstract:
PURPOSE: To improve the accuracy of the characteristic impedance of a through- hole.
CONSTITUTION: A through-hole 31 is composed of a first copper plating section 32 for a signal positioned at a center, a second copper plating section 34 surrounding the first copper plating section 32 and having ground potential and an insulator section 33 occupying a section between the first copper plating section 32 and the second copper plating section 34. The through-hole 31 constitutes coaxial cable structure.
Inventors:
IINO KAZUHIRO
YAMAZAKI MICHIO
MINEMATSU KIYOSHI
KITAJIMA MITSUKI
SHOJI SHUICHI
YAMAZAKI MICHIO
MINEMATSU KIYOSHI
KITAJIMA MITSUKI
SHOJI SHUICHI
Application Number:
JP18683592A
Publication Date:
February 10, 1994
Filing Date:
July 14, 1992
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H01P3/08; H01P5/08; H05K1/02; H05K1/11; H05K3/42; (IPC1-7): H05K1/11; H01P3/08; H01P5/08
Attorney, Agent or Firm:
Tadahiko Ito