US 4,727,012 AGranted

Method of manufacture for print heads of ink jet printers

AssigneeSiemens Aktiengesellschaft

InventorsFerdinand Quella, Hans Hadersbeck, Ernst Goepel

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Abstract

A print head of an ink jet printer is formed by a multilayer structure composed of a plurality of individual photoplastic films, segments of such films having a prescribed contour being removed by a photo-chemical treatment being defined on the individual photoplastic films in successive lamination procedures by the use of masks through which such photoplastic films are exposed. Passivation of unexposed films takes place after every lamination procedure by applying a light-absorbing solution. A three-dimensional structure is built up employing photoplastic films having thicknesses in the range between 10 .mu.m to 50 .mu.m and one or more masks having light transmissive regions which define a desired cross-section for the interior passages of the print head.

Claims11

Dependent claims

A method for manufacturing a print head for an ink jet printer, such print head having at least one ink chamber which is in communication with an ink supply and which discharges through an ink channel to a discharge opening from which a droplet of ink can be ejected in response to operation of a transducer element, comprising the steps of:

applying a plurality of photoplastic films to a carrier in successive lamination procedures,
individually masking one or more of said photoplastic films between the individual lamination procedures with masks each having a light transmissive region overlapping a portion of the previous light transmissive region and assigned to a particular one of said photoplastic films,
exposing said masked film to radiation, whereby a film segment for a dissolving treatment corresponding to said region is defined on the photoplastic film by means of said exposure, and
treating said photoplastic films with a dissolving treatment for shaping the film segments after one or more of said lamination procedures.

1 more element

Dependencies are inferred from the claim text.