PRINTED-CIRCUIT BOARD AND LIGHTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a printed wiring board 21 where a screwed land 42 is prevented from being peeled from an insulating substrate 22.

SOLUTION: Slit parts 44 from which the insulting substrate 22 is exposed are arranged in one land 42. The slit parts 44 are radially disposed from a center of the land 42 and they are arranged from head parts 35b of the screws 35 to an outer side. Gas is let free from the slit parts 44 even if gas occurs from within the insulating substrate 22 by adding pressure to the insulating substrate 22 at the time of clamping the screws 35 and adding heat to the insulating substrate 22 at the time of soldering, and the land 42 is prevented from being peeled from the insulating substrate 22.

COPYRIGHT: (C)2007,JPO&INPIT