Patent ID: 6450618
Filing Date: 2002-09-17
Classification: B41J,Y10T

Abstract:
A method of forming an ink jet head including;a subserate; a plurality of nozzles; a plurality of ink passageways each being communicated to a respective one of said plurality of nozzles, a vibration plate positioned in a part of each of said plurality of ink passageways, a plurality of independent electrodes formed on said substrate and facing said vibration plate, and a common electrode formed on said vibration plate, wherein a drive voltage is applied between said common electrode and any one of said plurality of independent electrodes for causing said vibration plate to electrostatically deform, thereby ejecting a drop of ink from one of said plurality of nozzles associated with the one independent electrode, wherein said vibration plate comprises single crystal Si while said substrate comprises glass having a coefficient on linear expansion close to a coefficient of linear expansion of said single crystal Si at temperature between 200Â° C. and 400Â° C., said method comprising: prior to thinning a single crystal Si plate, bonding the single crystal Si plate to said substrate by anodic bonding, said single crystal Si plate having a thickness sufficient to prevent it from deforming during anodic bonding; after said single crystal Si plate has been bonded to said substrate by anodic bonding, thinning said single crystal Si plate to a preselected thickness by etching or grinding to form said vibration plate; and adhering or bonding an ink passageway, ink chamber and nozzle section to said substrate.