Patent ID: 6450025
Filing Date: 2002-09-17
Classification: B81B,B81C,G01F,H05B

Abstract:
A micro-heater comprising:a substrate; and a thin film heater portion being fixed to the substrate and including: a heater layer; a first thin film laminated with one surface side of the heater layer, and formed by laminating a plurality of films including a compressive stress film and, a tensile stress film; and a second thin film laminated with another surface side of the heater layer so as to sandwich the heater layer with the lower thin film, and formed by laminating a plurality of films including a compressive stress film and a tensile stress film, wherein the heater layer is laminated at the substantially center portion of the thin film heater portion; one of the first thin film and the second thin film has an internal stress that warps the thin film heater portion in a domed-shape, and another of the first thin film and the second thin film has an internal stress that warps the thin film heater portion in a dished-shape; and each of the first thin film and the second thin film respectively has a film structure so that the internal stress for warping the thin film heater portion in the domed-shape and the internal stress that warps the thin film heater portion in the dished-shape cancel each other.