Preparation of thermal head

Abstract

Abstract PURPOSE:To improve printing quality by eliminating the irregularity of the resistance value of a heat generating resistor, by applying voltage to the heat generating resistor from both short sides thereof before connecting a common electrode to the heat generating resistor to perform ageing. CONSTITUTION:A glaze layer 2 is provided on an alumina substrate 1 and a heat generating resistor 3 comprising TaSiO2 is formed thereon in a strip shape. Next, voltage is applied to the heat generating resistor 3 from both short sides 3a, 3a thereof to perform ageing. Then, a comb-shaped common electrode 4 is formed from one long side of the heat generating resistor 3 so that a large number of the electrode fingers 4a thereof are positioned on the heat generating resistor 3. Further, a large number of indivisual electrodes 5 are formed from the other long side of said heat generating resistor 3 so as to be staggered with respect to the electrode fingers 4a to form a large number of dots due to the heat generating resistor 3. Furthermore, a protective film 6 is provided so as to cover said dots to form a thermal head.

Inventors

• 👤 Fumiko Matsunaga
• 👤 松永　文子
• 👤 Nobuhiro Oshima
• 👤 大島　信洋

Bibliographic Details