Patent ID: 6540336
Filing Date: 2003-04-01
Classification: B23K,B41J

Abstract:
A method for manufacturing a liquid discharge head, said head comprising:a top plate including a plurality of ink discharge ports for discharging ink droplets, a plurality of first liquid passages for supplying ink in correspondence to said plurality of ink discharge ports and a common liquid chamber for supplying the ink to said first liquid passages; a liquid discharge head substrate obtained by forming second liquid passages arranged adjacent to said first liquid passages and including bubble generating areas on a substrate on which a plurality of heat generating elements for causing said ink discharge ports to discharge the ink droplets are arranged and including drivers for driving said heat generating elements; and a moving diaphragm for completely isolating said first liquid passages and said second liquid passages from each other and displaceable by a bubble generated on said heat generating elements, said method comprising: a moving diaphragm forming step for providing said moving diaphragm in such a manner that a portion for fixing said moving diaphragm is covered; a step for providing a sacrifice layer on portions of said substrate on which said second liquid passages are formed; a step for forming a though-hole in a rear side of a surface of said substrate on which said sacrifice layer is provided; and a step for removing said sacrifice layer from said through-hole, wherein said portion for fixing said moving diaphragm is said substrate and said moving diaphragm is provided on the surface of said substrate on which said sacrifice layer is provided.