Patent ID: 11905168
Assignee: MICROJET TECHNOLOGY CO., LTD.
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B  F  H | IPC B  F  H

Claim 0:
1. A manufacturing method of a miniature fluid actuator comprising steps of:
(a) providing a flow-channel main body produced by a complementary metal-oxide-semiconductor (CMOS) process, wherein an insulation layer is formed by oxidizing a substrate, an oxide layer having a plurality of metal layers stacked therein to define a flow-channel etched region is formed by a deposition process of the CMOS process, and a protective layer is formed outermost by a deposition process of the CMOS process;
(b) forming an actuating unit by a deposition process, a photolithography process and an etching process, wherein a lower electrode layer, a piezoelectric actuation layer and an upper electrode layer are sequentially stacked by the deposition process, and the upper electrode layer, the piezoelectric actuation layer and the lower electrode layer are produced by the photolithography process and the etching process sequentially to obtain the actuating unit at a required size;
(c) forming at least one flow-channel by etching, wherein the at least one flow-channel is defined at a bottom of the substrate by an etching process;
(d) forming a vibration layer and a central through hole by a photolithography process and an etching process, wherein the vibration layer and the central through hole are defined in the flow-channel etched region of the flow-channel main body by the photolithography process and the etching process;
(e) providing an orifice layer, and etching the same to form at least one outflow opening, and roll-forming a dry film material on two sides of the orifice layer, and a chamber is defined by the orifice layer and the dry film material disposed on the two sides of the orifice layer; and
(f) flip-chip aligning and hot-pressing the orifice layer, wherein the orifice layer is mounted on the flow-channel main body by a flip-chip alignment process and a hot pressing process, and the chamber is sealed, thereby obtaining the miniature fluid actuator;
wherein the step (d) further comprises steps of:
(d1) defining a protective layer etched region on the flow-channel main body by the photolithograph process;
(d2) etching the protective layer to remove the protective layer etched region and expose the flow-channel etched region by the etching process; and
(d3) further removing the flow-channel etched region of the flow-channel main body by the etching process to define the vibration layer and the central through hole, wherein the flow-channel etched region is removed to form a communication channel in fluid communication with the at least one flow-channel at the bottom of the substrate;

wherein the vibration layer comprises a metal layer and an oxide layer, and the metal layer is surrounded by the oxide layer.