Invention Grant
- Patent Title: PPTC composition and device having low thermal derating and low process jump
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Application No.: US17295943Application Date: 2018-11-23
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Publication No.: US11881337B2Publication Date: 2024-01-23
- Inventor: Jianhua Chen , Chun-Kwan Tsang , Zhiyong Zhou , Yingsong Fu , Edward W. Rutter, Jr.
- Applicant: Littelfuse Electronics (Shanghai) Co., Ltd.
- Applicant Address: CN Shanghai
- Assignee: Littelfuse Electronics (Shanghai) Co., Ltd.
- Current Assignee: Littelfuse Electronics (Shanghai) Co., Ltd.
- Current Assignee Address: CN Shanghai
- Agency: KDW Firm PLLC
- International Application: PCT/CN2018/117250 2018.11.23
- International Announcement: WO2020/103142A 2020.05.28
- Date entered country: 2021-05-21
- Main IPC: H01C7/02
- IPC: H01C7/02 ; C08J5/18 ; C08K3/14 ; C08L23/06 ; C08L63/00 ; C08L27/16 ; C08L77/02

Abstract:
A novel polymer positive temperature coefficient (PPTC) material, device, and method of fabrication. One example of polymer positive temperature coefficient (PPTC) includes a polymer matrix, the polymer matrix comprising a first polymer. The PPTC material may further include a conductive filler, disposed in the polymer matrix; and at least one polymer filler, dispersed within the polymer matrix. The at least one polymer filler may comprise a second polymer, different from the first polymer, wherein the at least one polymer comprises a first melting temperature, and wherein the second polymer comprises a second melting temperature, the second melting temperature exceeding the first melting temperature by at least 20 C.
Public/Granted literature
- US20220013259A1 PPTC COMPOSITION AND DEVICE HAVING LOW THERMAL DERATING AND LOW PROCESS JUMP Public/Granted day:2022-01-13
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