1
Alfred I Pan, Howard H Taub, Harold W Levie: Ink jet head incorporating a thick unpassivated TaAl resistor. Hewlett Packard Company, June 5, 1990: US04931813 (74 worldwide citation)

A thermal ink jet head incorporates bubble-generating resistors, each with a relatively thick layer of unpassivated resistive material, such as TaAl. The thermal ink jet head includes an ink source, ink channels, respective orifices, and circuitry for providing the electrical energy which the resist ...


2
Christopher A Schantz, Eric G Hanson, Si Ty Lam, Paul H McClelland, William J Lloyd, Laurie S Mittelstadt, Alfred I Pan: Nozzle member including ink flow channels. Hewlett Packard Company, March 1, 1994: US05291226 (53 worldwide citation)

In one of the preferred embodiments, an inkjet printhead includes a nozzle member formed of a polymer material that has been laser-ablated to form inkjet orifices, ink channels, and vaporization chambers in the unitary nozzle member. The nozzle member is then mounted to a substrate containing heatin ...


3
Alfred I Pan, Ellen R Tappon: Composite orifice plate for ink jet printer and method for the manufacture thereof. Hewlett Packard Company, September 27, 1994: US05350616 (39 worldwide citation)

A composite orifice plate for a printer such as a thermal inkjet printer includes a first layer of non-wettable material and a second layer of wettable material joined to the first layer. In the orifice plate, at least one orifice is formed to extend through the first layer and at least one opening ...


4
Alfred I Pan, C S Chan, Conrad L Wright: Ink delivery system for printers. Hewlett Packard Company, June 9, 1992: US05121132 (32 worldwide citation)

An ink delivery system for an inkjet printer includes a vented supply chamber for providing a reservoir of ink and an ink compartment which is connected to the supply chamber via a hydrophobic membrane which acts as a fluid diode for regulating the flow of ink from the supply chamber into the compar ...


5
Christopher A Schantz, Eric G Hanson, Si Ty Lam, Paul H McClelland, William J Lloyd, Laurie S Mittelstadt, Alfred I Pan: Method of making a nozzle member including ink flow channels. Hewlett Packard Company, April 25, 1995: US05408738 (30 worldwide citation)

In one of the preferred embodiments, an inkjet printhead includes a nozzle member formed of a polymer material that has been laser-ablated to form inkjet orifices, ink channels, and vaporization chambers in the unitary nozzle member. The nozzle member is then mounted to a substrate containing heatin ...


6
C S Chan, Alfred I Pan: Ink delivery system for ink jet printers. Hewlett Packard Company, May 12, 1992: US05113199 (21 worldwide citation)

A system for delivering ink to print heads in thermal ink jet printers includes a liquid compartment with a gas space thereabove at sub-atmospheric pressure, a hydrophobic membrane mounted between the liquid compartment and the surrounding environment for allowing ambient gases to bubble into the li ...


7
Alfred I Pan: Edge profile control during patterning of silicon by dry etching with CCl.sub.4 -O.sub.2 mixtures. Signetics Corporation, J A Dinardo, R J Meetin, T A Briody, November 29, 1983: US04417947 (16 worldwide citation)

The edge profile of a silicon layer is shaped to have a gradual incline considerably less than 90.degree. by continuously reducing the amount of oxygen mixed with carbon tetrachloride in a reactive ion etching environment. The etching mode varies from complete isotropic etching when the amount of ox ...


8
Alfred I Pan, Eric G Hanson: Amorphous diffusion barrier for thermal ink jet print heads. Hewlett Packard Company, William H F Howard, October 23, 1990: US04965611 (15 worldwide citation)

Disclosed is an improved thermal ink jet print head with an amorphous diffusion barrier that inhibits corrosion associated with ink. The head has a silicon substrate, a silicon dioxide insulating layer, a tantalum aluminum alloy (TaAl) resistive layer, and two separated gold conductive regions forme ...