Title:
PATTERN DATA STRUCTURE OF PRINTED WIRING BOARD
Document Type and Number:
Japanese Patent JPH04241676
Kind Code:
A
Abstract:
PURPOSE: To make the formation of a land arbitrarily changeable by assembling the pattern data structure of the land of a basic land and numeral small land pieces.
CONSTITUTION: In a land 1, a basic land 4 is provided concentrically to a virtual through hole 3. The basic land 4 has the minimum land size which cannot be divided further. Then plural land pieces 2 are adjacently put around the basic land 4 in such a way that a doughnut-like ring formed of the land pieces 2 is divided by radial slits from the center point and a circular land 1 is formed as a whole. In addition, a pattern 4 is provided near the land 1 and a gap is secured between the pattern 5 and land 1 by deleting part of the land pieces 2.
Inventors:
EBARA TOKIO
Application Number:
JP301291A
Publication Date:
August 28, 1992
Filing Date:
January 16, 1991
Export Citation:
Assignee:
NEC CORP
International Classes:
G06F1/18; G06F17/50; H05K3/34; H05K1/00; H05K1/11; (IPC1-7): G06F1/18; G06F15/60; H05K3/34
Attorney, Agent or Firm:
Shin Uchihara