Patent ID: 6280642
Filing Date: 2001-08-28
Classification: B41J

Abstract:
A process for producing an ink jet head comprising a plurality of nozzles for ejecting ink, ink chambers communicating with the nozzles for passage and pressurization of the ink, and pressurizing means for creating a change in volume of the ink in the respective ink chambers to eject the ink through the nozzles, the process comprising the steps of:providing a transparent substrate having predetermined form and dimension to form a base plate member having front and back sides;forming a pattern of a base wall members made of a light-impermeable material on the front side of the base plate member,the pattern of the base wall members being formed by the sub-steps of:coating a base wall member-forming material on the whole of the front side of the base plate member;coating a photosensitive material on the whole area of the base wall member-forming material coating;selectively removing the photosensitive material coating according to a desired base wall member pattern by photolithography; andusing the photosensitive material pattern as a mask to selectively remove the underlying base wall member-forming material coating;coating a partitioning-member-forming photosensitive material in a predetermined thickness on the whole of the front side of the base plate member;selectively exposing the photosensitive material coating through the base wall member pattern to light to which the photosensitive material is sensitive by directing such light through the back side of the base plate member, thereby rendering exposed areas of the photosensitive material coating insoluble in a developing solution; anddeveloping the exposed photosensitive material coating to remove unexposed areas of the photosensitive material coating, thereby forming partitioning members above the base plate member in areas not occupied by the base wall members, and thus producing ink chambers between the partitioning members, each of the ink chambers comprising the base wall member provided above the base plate member in a pattern conforming to the form of the ink chambers.