Capillary

Abstract

Abstract PURPOSE:To equip a capillary with more strength and with a prolonged service life by a method wherein the peripheral surface of a cylinder provided at its center with a through-hole for a metal fine wire to move through is covered by an insulating layer and a mirror surface is formed on the cylinder end surface and on the wall of the through-hole that will be in contact with the metal wire. CONSTITUTION:Stainless steel or the like is formed into a trapezoid tapered toward its approximately 100mum-thick tip 2 and, at its center, a through-hole 3 is provided. A mirror surface 4 is formed on the wall of the through-hole 3 and at the tip, that is, the end face. For the formation of the mirror surface 4, the through-hole wall and the end face are covered by a glass material and the entirety is subjected to baking at a temperature of several hundred degrees, or a glass material containing a quantity of fire-resistant metal oxide such as alumina is subjected to a heat treatment. Such a process results in an approximately 10mum-thick mirror layer. A glass lining layer is weaker than a ceramic layer in terms of its capability to withstand a mechanical or thermal impact. However, a glass lining layer is strong enough to withstand a maximum load of approximately 60 grams expected to be imposed on it in a bonding process.

Inventors

• 👤 Koji Araki
• 👤 浩二 荒木
• 👤 Toshihiro Kato
• 👤 加藤　俊博

Bibliographic Details