摘要:
An ink jet head circuit board is provided which has heaters to generate thermal energy for ink ejection as they are energized. This circuit board reduces areas of the heaters to achieve higher printing resolution and image quality. This board also prevents a degradation of thermal energy efficiency and reduces power consumption. The protective insulation layer for the electrode wire layer is formed of two layers and one of the two layers is removed from above the heater to improve the heat energy efficiency. The resistor layer is deposited over the electrode wire layer. The patterning for removing the protective insulation layer is done in a wider range than a gap of the electrode wire layer, the gap being used to form the heater. Further, by forming the electrode wires in two layers, a possible reduction in an effective bubble generation area of the heater can be prevented.
摘要:
A bar code scanner for scanning a bar code or bar codes having a plurality of parallel bar symbols recorded in contrastive light reflection colors on a record medium. The scanner has an image sensor comprising a plurality of light responsive elements which are arranged in a straight line and activated one by one. The image sensor is supported within a casing which is carried close to the record medium. The casing is provided with a pair of parallel side guide members which extends orthogonally relative to the light responsive elements to define a scanning region. The parallel side guide members are connected by a transversal guide member which defines a scanning line at the end portions of the parallel side guide members.
摘要:
In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly.
摘要:
In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly.
摘要:
An ink jet recording head includes a substrate provided with an energy generating element to generate energy used for discharging ink, a discharge port through which the ink is discharged, a supply port for supplying the ink, and an ink path formed on the substrate for making the discharge port and the supply port communicate with each other, wherein wall members forming the ink path are made of an inorganic material, and a space between adjacent ink paths is filled up by a metal layer.
摘要:
The present invention provides an ink jet recording head which includes a substrate, an energy generating element which is disposed on the substrate and generates energy for discharging a liquid, an electrode which is disposed on the substrate and is electrically connected to the energy generating element, a passage-forming member which is disposed on the substrate, an adhesion layer which is disposed on the substrate and facilitates adhesion between the passage-forming member and the substrate, and a bump disposed on the electrode. The area of an upper surface of the bump is larger than the area of a lower surface of the bump, the lower surface being located on the substrate side, the upper surface being located opposite the lower surface, and a side face of the bump is covered with the adhesion layer. Thereby, a protective film is formed around the bump.
摘要:
A method for processing a silicon substrate includes preparing a first silicon substrate including an etching mask layer including first and second opening portions; forming a first recess in a portion of the silicon substrate corresponding to a region in the first opening portion; etching the silicon substrate by crystal anisotropic etching through the etching mask layer with an etching apparatus and an etchant, the etching proceeding in the first and second opening portions to form a through hole in a position corresponding to the first opening portion and to form a second recess in a position corresponding to the second opening portion; calculating an etching rate of the silicon substrate in terms of the etchant by using the second recess; and determining, by using the calculated etching rate, an etching condition for etching another silicon substrate with the etching apparatus after the etching of the first silicon substrate.
摘要:
A manufacturing method for a substrate for an ink jet head, including formation of an ink supply port in a silicon substrate, the method includes a step of forming, on one side of the substrate, an etching mask layer having an opening at a position corresponding ink supply port; a step of forming unpenetrated holes through the opening of the etching mask layer in at least two rows in a longitudinal direction of the opening; and a step of forming the ink supply port by crystal anisotropic etching of the substrate in the opening.
摘要:
A method for processing a substrate includes preparing a substrate having a first layer on a first surface side thereof, the first layer having a material capable of suppressing transmission of laser light, processing the substrate with laser light from a second surface that is opposite the first surface of the substrate toward the first surface of the substrate, and allowing the laser light to reach the first layer to form a hole in the substrate, and performing etching of the substrate from the second surface through the hole.
摘要:
An ink jet head circuit board is provided which has heaters to generate thermal energy for ink ejection as they are energized. This circuit board has the heaters formed with high precision to reduce their areas. It also has provisions to protect the electrode wires against corrosion and prevent a progress of corrosion. The substrate is deposited with the thin first electrodes made of a corrosion resistant metal. This is further deposited with the resistor layer. The second electrodes made of aluminum are deposited to overlap the first electrodes to form the heater without causing large dimensional variations among the heaters. With this construction, if a defect should occur in a protective layer on or near the heater, a progress of corrosion can effectively be prevented because the material of the resistor layer is more resistant to encroachment than aluminum and the first electrodes are corrosion resistant.