Manufacture of a print head
AssigneeHewlett-Packard Development Company, L.P.
InventorsRio Rivas, Robert Messenger, Becky Clark, Rob Pugliese, Siddhartha Bhowmik
Life of this patent
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Abstract
Manufacturing method for an inkjet print head, comprising forming a nozzle layer onto a substrate, depositing an LSE (low surface energy) coating onto the nozzle layer, depositing a sacrificial film onto the LSE coating, post processing the substrate, and removing the sacrificial film from the LSE coating, the LSE coating having a water contact angle of at least 50° after removal of the sacrificial film.
Claims15
Manufacturing method for an inkjet print head, comprising
- forming a nozzle layer onto a substrate,
- providing an LSE (low surface energy) coating onto the nozzle layer,
- providing a sacrificial film onto the LSE coating,
- post processing the substrate, and
- removing the sacrificial film from the LSE coating, the LSE coating having a water contact angle of at least 50° after removal of the sacrificial film.
Intermediate inkjet print head, comprising
- a nozzle layer comprising pre-patterned nozzles,
- an LSE coating provided on top of the nozzle layer comprising openings near the nozzles for leaving open the nozzles, and
- a sacrificial film provided on top of the LSE coating, arranged to withstand post processing and to be removed from the LSE coating after said post processing while maintaining a relatively high water contact angle of the LSE coating.
Method of maintaining a relatively high water contact angle of a nozzle surface during manufacture of the print head, comprising
- providing a nozzle layer comprising pre-patterned nozzles,
- providing an LSE (Low Surface Energy) coating on top of the nozzle layer,
- providing a protective film on top of the LSE coating,
- ashing the inside of the nozzles while the sacrificial film maintains the water contact angle of the LSE coating above 50°, and
- removing the sacrificial film from the LSE coating.
Dependencies are inferred from the claim text.