Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
1997-06-06
2003-02-11
Vo, Peter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S890100, C029S281400, C347S056000, C347S061000
Reexamination Certificate
active
06516509
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for manufacturing a liquid jet head having a structure that enables movable members to be displaced. More particularly, the invention relates to a method for manufacturing a head in accordance with a new discharging principle.
2. Related Background Art
In recent years, there has been developed a printing head, which uses the so-called bubble jet method whereby to heat ink and create bubbles for use of discharging ink onto a recording sheet for printing. Since this printing head is effective in enhancing the precision of printing, it is widely used practically.
For an assembling system for assembling a printing head using the bubble jet method, it is required to perform an accurate positioning in a range of micron order with respect to the heaters that heat ink, as well as to the discharge ports through which ink is discharge in the form of bubbles created by film boiling exerted by heat generated by heaters. For example, in order to attain a high precision of approximately 360 dpi as a printing accuracy, it is necessary to arrange 64 discharge ports at equal intervals in an area of approximately 4.5 mm. In this case, the arrangement pitch is approximately as minute as 70 micron.
Here, using a highly precise processing system such as a laser processor, the formation of discharge ports is possible at extremely small intervals as described above on the orifice plate installed on the front of a ceiling member in a high precision given within an allowable range. Also, for the formation of heaters, a highly precise etching technique is adopted to make it possible to form them on a heater board also within in a specific high precision within an allowable range.
When adhesively bonding this heater board and ceiling plate, it is necessary to position the heaters and the grooves provided for the ceiling plate in good precision.
As a method for executing this positioning, an image processing technique or the like is used to measure the positions of heaters and the groove of the ceiling plate, and then, while adjusting the position of the ceiling plate with respect to the heater board, these members are bonded (which is disclosed in the specification of Japanese Patent Laid-Open Application No. 4-171131). Also, there has been proposed a method whereby to provide a reference surface for the ceiling plate, which is caused to abut upon the cutting surface of the heater board, and then, while adjusting the position of the ceiling plate with respect to the heater board, these members are bonded.
Of these methods for adhesively bonding the heater board and ceiling plate, the later is simpler than the former in the equipment arrangement. Also, the line arrangement is made simpler, thus providing the advantage that the reduction of manufacturing costs is possible.
SUMMARY OF THE INVENTION
The present invention is designed to provide a method for manufacturing a component having movable members therefor, which is capable of presenting a good yield rate and obtaining a reliable accuracy in the process of manufacture with respect to the invention filed by the present inventors previously as an epoch-making presentation of discharging principle, and related structures, as well as excellent effects obtainable by the application thereof. Also, the invention is designed to solve the problems encountered in the conventional techniques of manufacture.
It is the primary object of the present invention to provide a method for adhesively bonding a thin film material having a number of movable members therefor on a desirable location of a liquid path portion in good precision simply and reliably without damaging the movable members.
It is another object of the present invention to provide a method for bonding a heater board and a ceiling plate, while adjusting the positions thereof without causing any damage to valves residing between the heater board and the ceiling plate in a process of the reference surface of the ceiling plate being caused to abut upon the cutting surface of the heater board for adhesively bonding them.
In order to achieve the object described above, the present invention provides a method for manufacturing a component having a number of liquid paths each with a movable member for use of liquid discharge. This methods comprises the steps of arranging a thin film material provided with a number of movable members and a component provided with a number of recessed portions corresponding liquid paths; and displacing the movable members corresponding to the recessed portions in a state of the movable members being displaced.
Also, the present invention relates to a method for manufacturing a liquid jet head using components produced by a method of manufacture comprising a step of placing a substrate having a number of heat generating elements arranged therefor with respect to the aforesaid component so as to position the heat generating elements corresponding to the movable members.
Also, the present invention relates to a liquid jet head produced by a method for manufacturing a liquid jet head provided with discharge ports for discharging liquid; air bubble generating areas for creating air bubbles in liquid; movable members arranged to face the air bubble generating areas, each capable of being displaced between a first position and a second position further away from each of said air bubble generating areas than the first position, this movable member being displaced from the first position to the second position by pressure exerted by each air bubble created in each of the air bubble generating areas, at the same time, causing each air bubble to expand larger in the upstream than the downstream in the direction toward the discharge port for discharging liquid from each of the discharge ports.
Also, in order to achieve the object described above the present invention is designed for a method for manufacturing a liquid jet head provided with a separation wall having movable members capable of being displaced, and with an elemental substrate having heat generating elements for displacing the movable members, including the following steps of:
preparing the separation wall and the elemental substrate;
coating liquid on the separation wall or on the elemental substrate; and
positioning the separation wall to the elemental substrate to cause the separation wall to be closely in contact with the elemental substrate through liquid.
The present invention also relates to a method for shifting a thin film material to cause a thin film material of 50 &mgr;m thick or less to float on a base for use thereof by tilting the base to utilize the weight of the thin film material own for shifting the thin film material.
The present invention also relates to a method for positioning a thin film material, which comprises the steps of carrying a thin film material, which is caused to float by a method for shifting a thin film material referred to in the preceding paragraph, and of causing the thin film material to abut upon an abutting reference to position the thin film material.
The present invention also relates to a method for manufacturing a liquid discharging member comprising a step of positioning a thin film material by the application of a positioning method referred to in the preceding paragraphs when the thin film material is used for a liquid jet head structured by a member having liquid flow paths and an elemental substrate arranged therefor.
Also, the present invention relates to a method for manufacturing a liquid jet head provided with a thin film material between a ceiling plate having liquid flow paths and an elemental substrate having heat generating elements arranged therefor, comprising a step of causing the thin film material to float on a base, and tilting the base to utilize the weight of the thin film own to allow it to abut upon the reference surface of the base for provisional positioning.
Also, the present invention relates to a liquid jet head manufactured using the method of manufacture
Asakawa Yoshie
Fukai Hisashi
Hayasaki Kimiyuki
Kashino Toshio
Kigami Hiroyuki
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Tugbang A. Dexter
Vo Peter
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