Nozzle guard alignment for ink jet printhead

B - Operations – Transporting – 41 – J

Patent

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B41J 2/145 (2006.01) B41J 2/14 (2006.01)

Patent

CA 2435272

A printhead for an ink jet printer with an array 14 of ink ejection nozzles 22 formed from MEMS techniques. To protect the delicate nozzle structures, a nozzle guard 80 covers the exterior surface of the array 14. A corresponding array of apertures 84 is formed in the guard 80. To attach the guard 80 to the silicon substrate 16 carrying the nozzles 22, alignment formations 148 configured for engagement with complementary formations on a nozzle guard 80. For precise registration between the nozzles 22 and the respective apertures 84 in the guard 80, the alignment formations 148 may be formed using the same etching and deposition techniques used to form the nozzles 22.

L'invention concerne une tête d'impression pour imprimante à jet d'encre dotée d'un groupe de buses d'éjection d'encre (20) formées par des techniques MEMS. Pour protéger les structures délicates des buses, une protection (80) de buse recouvre la surface extérieure du groupe (14). Un groupe correspondant d'ouvertures (84) est formé dans la protection (80). Pour fixer la protection (80) au substrat en silicium (16) portant les buses (22), des formations d'alignement (148) configurées pour recevoir des formations complémentaires sur une protection (80) de buse sont prévues. Afin de permettre un alignement précis entre les buses (22) et les ouvertures respectives (84) dans la protection (80), les formations d'alignement (148) peuvent être formées à l'aide des même techniques d'attaque et de dépôt utilisées pour la formation des buses (22).

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