Printed board and ink jet head

• US 20070000974A1
• Filed: 06/28/2006
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha
• Original Assignee: Brother Kogyo Kabushiki Kaisha
• Inventors: Kubo, Tomoyuki
• Granted Patent: US 7,837,301 B2
• Time in Patent Office: Days
• US Class Current: 228/180.210
• CPC Class Codes: B41J 2/14072 Electrical connections, e.g. details on electrodes, connecting the chip to the outside...
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
• CPC Class Codes: H05K 2201/09409 Multiple rows of pads, lands, terminals or dummy patterns; Multiple rows of mounted components
• CPC Class Codes: H05K 2201/09709 Staggered pads, lands or terminals; Parallel conductors in different planes
• CPC Class Codes: H05K 2201/09727 Varying width along a single conductor; Conductors or pads having different widths
• CPC Class Codes: H05K 2201/10681 Tape Carrier Package [TCP]; Flexible sheet connector
• CPC Class Codes: H05K 3/363 by soldering

Abstract

When the driving printed wires from the drive IC are passed between the terminal lands and connected to respective terminal lands, and the printed wires of a number greater than the number of printed wires that can be passed between the terminal lands are required, the driving printed wires from the drive IC are led on the outer side of the columns of the plurality of terminal lands and connected to respective terminal lands.

Claims

1. A printed board comprising:

an insulating film;

a plurality of terminal lands forming a plurality of columns and arranged adjacent to each other at one end portion of one surface of the insulating film; and

a plurality of printed wires arranged on one surface of the insulating film and connected to the corresponding plurality of terminal lands respectively;

wherein

the plurality of printed wires includes;

a plurality of printed wires arranged extending to the corresponding terminal lands in a direction intersecting an extending direction of the terminal land columns formed by the plurality of terminal lands and passed between the plurality of terminal lands; and

a plurality of printed wires arranged extending in a direction intersecting the extending direction on an outer side of the plurality of terminal land columns.

2. The printed board according to claim 1, wherein the plurality of printed wires arranged extending on the outer side of the plurality of terminal land columns are connected to the terminal lands arranged in one or a plurality of terminal land columns on the edge of the one end portion side out of the plurality of terminal land columns.

3. The printed board according to claim 1, wherein the plurality of terminal lands are arranged in a zigzag manner.

4. The printed board according to claim 1, wherein a line width of the printed wire is formed to be narrower as the distance from the corresponding terminal land becomes larger.

5. The printed board according to claim 1, wherein the plurality of printed wires are arranged extending on both outer sides in the extending direction of the plurality of terminal land columns;

and

the difference between the number of printed wires arranged on one side and the number of printed wires arranged on the other side is less than or equal to 1.

6. The printed board according to claim 1, further comprising:

a plurality of through holes, each perforated at an arrangement position of the terminal land of the insulating film, for exposing one part of the terminal land on the other surface of the insulating film; and

an electrically conductive brazing filler metal attached to the terminal land by way of the through hole.

7. An ink jet head comprising:

a flow channel unit including a plurality of discharge ports for discharging ink and a plurality of pressure chambers each communicated to the plurality of discharge ports, the plurality of pressure chambers being arranged in a plurality of columns on one surface;

an actuator unit, that includes a plurality of connecting terminals arranged at positions corresponding to the pressure chambers and that is fixed to one surface of the flow channel unit, for changing the volume in the pressure chambers;

a driving element for outputting a driving voltage to supply to the connecting terminals of the actuator unit; and

a printed board interposed between the actuator unit and the driving element, and including a plurality of printed wires for supplying the driving voltage to the connecting terminals, wherein

the printed board is a printed board according to claim 1,

the connecting terminals corresponding to the terminal lands are respectively connected to the terminal lands;

the driving element is connected to the plurality of printed wires on the side opposite the side on which the actuator unit is connected with respect to a direction intersecting the extending direction of the terminal land columns; and

the dimension of the printed board in the extending direction of the terminal land columns is smaller than the dimension of the actuator unit connected to the printed board.