THERMAL HEAD AND MANUFACTURING METHOD OF THERMAL HEAD

To achieve a thermal head having excellent durability, in which a protective film covering a heat element is prevented from being peeled.SOLUTION: A thermal head includes: a heat element 16 arranged on a substrate 10; an electrode 13 that supplies power to the heat element 16; a first protective film 17 that has an insulation property, is arranged on the substrate 10, covers the heat element 16, and covers at least a part of the electrode 13; and a second protective film 19 arranged above the first protective film 17. An internal stress of the second protective film 19 is higher in a side close to the first protective film 17 than a side far from the first protective film 17.SELECTED DRAWING: Figure 1 【課題】発熱抵抗体を覆う保護膜の剥離を防止し、耐久性に優れたサーマルヘッドを実現する。【解決手段】サーマルヘッドは、基板１０上に配置されている発熱抵抗体１６と、発熱抵抗体１６に電力を供給する電極１３と、基板１０上に配置され、発熱抵抗体１６を覆うとともに、電極１３の少なくとも一部を覆う絶縁性の第１保護膜１７と、第１保護膜１７より上に配置される第２保護膜１９とを備え、第２保護膜１９の内部応力は、第１保護膜１７から遠い側において、第１保護膜１７に近い側よりも高い。【選択図】図１