| 摘要 |
PURPOSE:To attain a small-sized thermal head having excellent adhesion with thermo sensitive paper and superior in resolution by a method wherein heating resistors and associated wiring parts are formed on the surface of an elliptic cylindrical substrate with larger curvature into desired patterns separately. CONSTITUTION:Using an elliptic cylindrical substrate 1 which has a section comprising moderate curved parts AB, CD and sharp curved parts BC, AD, resistant films 2 made of Ni-Cr, etc., conductive films (Cu films) 5 constituting wiring parts 3 and lead wire connecting parts 4, and heating resistors 6 in the desired patterns are formed on the surface of the curved part AB. Then, a protective film 7 made of SiC, etc. is formed thereon so as to obtain a thermal head (numeral 8 denotes lead wires welded to the connecting parts 4). |
