Abstract: A method for cleaving a semiconductor crystal body having a first surface and an opposite second surface, comprising the steps of forming a channel on the first surface of the semiconductor, scribing a portion of the second surface opposite the channel on the first surface, and mechanically cleaving the semiconductor along a plane defined by said channel on the first surface and said scribe on the second surface.

Abstract: A porous cardiac pacemaker electrode comprising a concavo-convex electrode cap having a plurality of apertures therethrough and an electrode shaft having a supporting edge formed thereon to which the concave surface of the electrode cap is joined. The porous cardiac pacemaker electrode is produced by deforming a platinum plate into a concavo-convex shaped cap member, forming a plurality of selectively spaced apertures through the electrode cap member to make the electrode cap substantially porous, forming an electrode shaft having a supporting edge, and joining the supporting edge of the electrode shaft to the concave surface of the electrode cap member.

Abstract: This disclosure depicts an electronic timepiece having complementary electro-optical and electro-mechanical displays. The electro-mechanical time display comprises a stepping motor driving hour and minute hands to continuously display the hours and minutes of the day, the most used time functions. The electro-optical display is a normally off two-digit LED display which is activated by user command to display at least one additional time-related function having a lower normal use factor than hours or minutes. The complementary electro-optical and electro-mechanical time displays are controlled from a common control means.