Invention Grant
- Patent Title: Three-dimensional integrated stretchable electronics
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Application No.: US16500507Application Date: 2018-04-03
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Publication No.: US11375895B2Publication Date: 2022-07-05
- Inventor: Sheng Xu , Yang Li
- Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
- Applicant Address: US CA Oakland
- Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
- Current Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
- Current Assignee Address: US CA Oakland
- Agency: Mayer & Williams PC
- Agent Stuart H. Mayer
- International Application: PCT/US2018/025956 WO 20180403
- International Announcement: WO2018/187376 WO 20181011
- Main IPC: A61B5/00
- IPC: A61B5/00 ; A61B5/296 ; H05K3/28 ; H01L21/48 ; H01L23/538 ; H01L25/16 ; H01L23/00 ; H01L21/56 ; H01L21/60

Abstract:
A method of fabricating a stretchable and flexible electronic device includes forming each of the functional layers is by: (i) forming on an elastomer substrate a conductive interconnect pattern having islands interconnected by bridges; (ii) applying a conductive paste to the islands; (iii) positioning at least one functional electronic component on each island; and (iv) applying heat to cause the conductive paste to reflow. An elastomer encapsulant is formed over the functional electronic components and the conductive interconnect pattern on each of the functional layers. The elastomer encapsulant has a Young's modulus equal to or less than that of the substrate. The encapsulant includes a pigment to increase absorption of laser light. At least one via is laser ablated, which provides electrical connection to any two functional layers. The via is filled with solder paste to create a bond and electrical connection between the functional layers.
Public/Granted literature
- US20200085299A1 THREE-DIMENSIONAL INTEGRATED STRETCHABLE ELECTRONICS Public/Granted day:2020-03-19
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