Abstract: An over-current protection device includes first and second electrode layers and a PTC material layer laminated therebetween. The PTC material layer includes a polymer matrix, and a conductive filler. The polymer matrix has a fluoropolymer. The total volume of the PTC material layer is calculated as 100%, and the fluoropolymer accounts for 47-62% by volume of the PTC material layer. The fluoropolymer has a melt viscosity higher than 3000 Pa·s.

Abstract: An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a polymer matrix and a first conductive filler. The polymer matrix includes a polyolefin-based polymer and a fluoropolymer. The fluoropolymer has a melt flow index higher than 1.9 g/10 min, and the polyolefin-based polymer and the fluoropolymer together form an interpenetrating polymer network (IPN). The first conductive filler has a metal-ceramic compound dispersed in the polymer matrix.

Abstract: An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a first polymer and a conductive filler. The first polymer consists of polyvinylidene difluoride (PVDF), and PVDF exists in different phases such as ?-PVDF, ?-PVDF and ?-PVDF. The total amount of ?-PVDF, ?-PVDF and ?-PVDF is calculated as 100%, and the amount of ?-PVDF accounts for 48% to 55%. The conductive filler has a metal-ceramic compound.

Abstract: An over-current protection device includes a first metal layer, a second metal layer and a heat-sensitive layer laminated therebetween. The heat-sensitive layer exhibits a positive temperature coefficient (PTC) characteristic and includes a first polymer and a conductive filler. The first polymer consists of polyvinylidene difluoride (PVDF), and PVDF exists in different phases such as ?-PVDF, ?-PVDF and ?-PVDF. The total amount of ?-PVDF, ?-PVDF and ?-PVDF is calculated as 100%, and the amount of ?-PVDF accounts for 33% to 42%.

Abstract: A token device that contains software and firmware required for running and installing a variety of applications is provided. The token is configured to connect to a host device via a USB port, wireless receiver or other means. The token may contain varying combinations of installers, applications, drivers, memory, and firmware. Token-related and non-token related applications that may be contained in the token's memory may include those required for smart card, cryptographic service provider, authentication, firewall, antivirus, and VPN type applications.

Abstract: A portable non-volatile memory device and method for preventing unauthorized access to data stored on the memory device is provided. The invented memory device and method prevents unauthorized access to data stored on the device without requiring self-installing software to protect the data stored on the device. Data and information stored on the device may be accessed or manipulated quickly. Coupling the invented device to the computer activates the device. Upon activation, a window is generated on a computer screen. A Graphical User Interface requests authentication information for accessing data stored on the device. If the correct authentication information is input, then access to the data stored on the invented device is granted, otherwise access to the data is denied. Once access is granted, data stored on the device may be displayed in the window and can be transferred between the device and a host computer.