Method of bonding printed circuit sheets
AssigneeCanon Production Printing Holding B.V.
InventorPeter J. M. Janssen
Life of this patent
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Abstract
A method of bonding printed circuit sheets to one another, each of the printed circuit sheets having a pattern of electrically conductive tracks, and the bonding being carried out by applying an adhesive to one of the sheets in a connection zone where the tracks on the one sheet are to be connected to corresponding tracks on the other sheet, superposing the sheets in the connection zone such that the adhesive is sandwiched between the sheets, and aligning the sheets such that corresponding tracks on the two sheets are aligned with one another. The method includes a preparatory step of forming extra tracks on the two sheets such that, in the alignment and compression steps, the extra tracks are brought into engagement with one another and constitute a barrier for the adhesive.
Claims17
An inkjet print head assembly comprising:
- a plurality of actuators, each of the plurality of actuators being configured for applying a pressure pulse to a pressure chamber for ejecting a droplet of fluid from a nozzle in response to a control signal transmitted from a controller to a respective of the plurality of actuators;
- a first printed circuit sheet comprising a pattern of electrically conductive tracks connected at one end to the plurality of actuators;
- and
- a second printed circuit sheet bonded by an adhesive to the first printed circuit and comprising a pattern of electrically conductive tracks in electrical connection with respective ones of the pattern of electrically conductive tracks of the first printed circuit board,
- wherein each of the first and second printed circuit sheets comprises extra tracks brought into engagement with one another and constituting a barrier for the adhesive, and
- wherein the extra tracks are not connected to the plurality of actuators and/or the controller.
An inkjet print head assembly comprising:
- a plurality of actuators, each of the plurality of actuators being configured for applying a pressure pulse to a pressure chamber for ejecting a droplet of fluid from a nozzle in response to a control signal transmitted from a controller to a respective of the plurality of actuators;
- a first printed circuit sheet comprising a pattern of electrically conductive tracks connected at one end to the plurality of actuators;
- and
- a second printed circuit sheet bonded by an adhesive to the first printed circuit and comprising a pattern of electrically conductive tracks in electrical connection with respective ones of the pattern of electrically conductive tracks of the first printed circuit board,
- wherein each of the first and second printed circuit sheets comprises extra tracks brought into engagement with one another and constituting a barrier for the adhesive,
- wherein the extra tracks are not connected to the plurality of actuators and/or the controller,
- wherein the first and second printed circuit sheets are flexible first and second printed circuit sheets, and
- wherein the controller is mounted on the second printed circuit sheet.
An inkjet print head assembly comprising:
- a plurality of actuators, each of the plurality of actuators being configured for applying a pressure pulse to a pressure chamber for ejecting a droplet of fluid from a nozzle in response to a control signal transmitted from a controller to a respective of the plurality of actuators;
- a first printed circuit sheet comprising a pattern of electrically conductive tracks connected at one end to the plurality of actuators;
- and
- a second printed circuit sheet bonded by an adhesive to the first printed circuit and comprising a pattern of electrically conductive tracks in electrical connection with respective ones of the pattern of electrically conductive tracks of the first printed circuit board,
- wherein each of the first and second printed circuit sheets comprises extra tracks brought into engagement with one another and constituting a barrier for the adhesive,
- wherein the extra tracks are not connected to the plurality of actuators and/or the controller,
- wherein the first and second printed circuit sheets are flexible first and second printed circuit sheets, and
- wherein the print head is formed of stacked silicon substrates and the first printed circuit sheet is bonded to one of the substrates.
Dependencies are inferred from the claim text.