Telecom Italia S.p.a.

Olivetti Tecnost S.p.a.

Mara Piano

Renato Conta

A process for manufacturing a monolithic thermal ink jet printhead () comprising a plurality of chambers () and of nozzles (), comprises steps of () depositing a plurality of sacrificial layers (), of obtaining, by means of exposure and development operations, a plurality of casts (), of () applying a structural layer (), and subsequently steps of () removing the casts () and of () removing the sacrificial layers (), in order to produce a plurality of chambers () and nozzles ().

Process for manufacturing a monolithic printhead with truncated cone shape nozzles

An actuating assembly () for ink jet printheads consists of a silicon die (), which comprises a groove () and a lamina (), and of a structure () produced monolithically in the same production process. The actuating assembly () comprises a microhydraulics (), the latter in turn comprising a plurality of channels () and chambers (), made inside the structure () by means of a sacrificial metallic layer (). A conducting layer () forms a single interconnected equipotential network used as the electrode during the processes of electrochemical etch stopping on the groove (), of electrodeposition of the sacrificial layer () and of the latter's subsequent removal.

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Chiaverano, Italy

Mara Piano