MANUFACTURE OF HEAT-GENERATING SUBSTRATE FOR USE IN THERMAL HEAD

摘要

PROBLEM TO BE SOLVED: To clearly pick up and binarize an image of an alignment mark at all times by forming an electric insulating protecting film for covering a front face of a substrate to cover at least an electrode and a heat-generating resistance body and not to cover at least one alignment mark. ;SOLUTION: An alignment mark 14 is attached to a heat sink of a heat- generating substrate 10 so that a protecting glass 20 does not cover the alignment mark 14 and covers at least an electrode and a heat-generating resistance body 16. A screen of a pattern whereby a material for the protecting glass 20 is not printed on the alignment mark 14 is used. Accordingly, an image of the alignment mark 14 is clearly picked up, binarized and a position accuracy of the heat-generating substrate 10 to the heat sink is always secured, leading to improvement in good quality and reduction in cost. A protecting film can be formed by sputtering with SiO2 or the like material, in place of printing, baking the protecting glass 20.;COPYRIGHT: (C)2000,JPO