Rohm Co., Ltd.

Mineo Nishikawa

Hiroshi Hayashi

Takaya Nagahata

Shigeo Ota

Masayoshi Yamaguchi

Masato Sakai

A thermal head comprises a head circuit board having a surface carrying a heating resistor line and at least one drive element for heating the resistor line. The drive element is enclosed in a resinous package. At least a surface portion of the resinous package is electrostatically conductive but electrically non-conductive to work as antistat. The antistatic surface portion or entirety of the resinous package may be made of electrically non-conductive matrix resin which contains a predetermined percentage of electrically conductive substance.

Thermal head

A thermal printing head comprises a support member, a head circuit board supported on the support member, a connector board overlapped on the head circuit board, and a presser member for pressing the connector board against the head circuit board. The support member is flexible with a modulus of elasticity lying within a range of 1.times.10.sup.4 -5.times.10.sup.5 kg/mm.sup.2. The head circuit board carries a comb-like terminal portion arranged in a limited central portion which is substantially smaller in length than the head circuit board. The connector board also carries a comb-like terminal portion corresponding to the terminal portion of the head circuit board, and the length of the connector board is substantially smaller than that of the head circuit board.

Growing community of inventors

Kyoto, Japan

Mineo Nishikawa