Patent ID: 6109738
Filing Date: 2000-08-29
Classification: B41J

Abstract:
An ink jet print head comprising a plurality of pressure generating chambers, an elastic film, and piezoelectric elements corresponding to said pressure generating chambers, the piezoelectric elements being formed in respective regions facing said pressure generating chambers, and each of said piezoelectric elements including a lower electrode film, a piezoelectric film and an upper electrode film, wherein, for each pressure generating chamber,A) said piezoelectric film and said upper electrode film are formed within said respective region facing said corresponding pressure generating chamber; andB) a portion of said lower electrode film facing said corresponding pressure generating chamber is continuous to outside said respective region facing said corresponding pressure generating chamber to a wiring pattern interconnecting said regions facing said corresponding pressure generating chambers; andwherein, within each of said regions facing said pressure generating chambers, a portion of said lower electrode film facing a peripheral edge of said piezoelectric film is removed.