公开(公告)号：WO2020191522A1

公开(公告)日：2020-10-01

申请号：PCT/CN2019/079251

申请日：2019-03-22

申请人： LITTELFUSE ELECTRONICS (SHANGHAI) CO., LTD.

发明人： CHEN, Jianhua ,  WANG, Bing ,  LI, Pinghong ,  HU, Cheng

IPC分类号： H01C7/02

摘要： Approaches provided herein include a protection device assembly having a protection component and a first electrode layer extending along a first main side of the protection component. The first electrode layer may include a first section separated from a second section by a first gap. The assembly may further include a second electrode layer extending along a second main side of the protection component, the second electrode layer including a third section separated from a fourth section by a second gap, wherein the first gap is aligned with the second gap. The assembly may further include a first insulation layer disposed over the first electrode layer, and a second insulation layer disposed over the second electrode layer. The assembly may further include a solder pad extending around an end of the protection component, the solder pad further extending over the first insulation layer and the second insulation layer.

公开(公告)号：WO2020037539A1

公开(公告)日：2020-02-27

申请号：PCT/CN2018/101708

申请日：2018-08-22

申请人： LITTELFUSE ELECTRONICS (SHANGHAI) CO., LTD.

发明人： CHEN, Jianhua ,  WANG, Bryan

IPC分类号： H01C7/02

摘要： A positive coefficient temperature (PTC) device(10) including an electrically insulating substrate(12), first and second upper electrodes(14a,14b) disposed on opposing ends of a first surface of the substrate(12) with a first gap(16) therebetween, first and second lower electrodes(18a,18b) disposed on opposing ends of a second surface of the substrate(12) with a second gap(20) therebetween, the second surface opposite the first surface, a first terminal(22a) covering the first upper electrode(14a) and the first lower electrode(18a), a second terminal(22b) covering the second upper electrode(14b) and the second lower electrode(18b), and a quantity of PTC material(26) disposed within the first gap (16)and connecting the first upper electrode(14a) to the second upper electrode(14b).

公开(公告)号：WO2020103142A1

公开(公告)日：2020-05-28

申请号：PCT/CN2018/117250

申请日：2018-11-23

申请人： LITTELFUSE ELECTRONICS (SHANGHAI) CO., LTD.

发明人： CHEN, Jianhua ,  TSANG, Chun-Kwan ,  ZHOU, Zhiyong ,  FU, Yingsong ,  RUTTER, Edward W. Jr.

IPC分类号： H01C7/02

摘要： 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 20C.