Abstract:
A printed circuit board having an electronic component embedded is disclosed. The printed circuit board has four electrically conductive layers and three core layers formed interleavedly. By properly removing a portion of the printed circuit board, the electronic component can be exposed. It has advantages that the exposed electronic component can be a CCD, CMOS or module. When the devices mentioned are embedded in the printed circuit board, one part of them can be exposed from the printed circuit board for normal functions. The overall thickness of the printed circuit board assembly can be minimized to meet the trend of compact design of electronic products.
Abstract:
A silicon wafer having colored top side is disclosed in the present invention. The silicon wafer includes: a wafer; a first semi-conductor layer, formed on at least a portion of a top side of the wafer, having periodical structures to form a grating pattern, and a second semi-conductor layer, formed on the first semi-conductor layer with a bottom side substantially fully contacted with the periodical structures. The first semi-conductor layer and the second semi-conductor layer form a photonic crystal layer and work to reflect a predetermined wavelength range of incident visible light beams. The present invention provides a silicon wafer which can reflect specified color(s) from the surface facing external light beams. Therefore, dies from cutting the silicon wafer with functions to interact with external environment rather than packaged can have advantages to show some specified logo or trademark.
Abstract:
A printed circuit board having an electronic component embedded and a method making the same are disclosed. The printed circuit board has four electrically conductive layers and three core layers formed interleavedly. By properly removing a portion of the printed circuit board, the electronic component can be exposed. It has advantages that the exposed electronic component can be a CCD, CMOS or module. When the devices mentioned are embedded in the printed circuit board, one part of them can be exposed from the printed circuit board for normal functions. The overall thickness of the printed circuit board assembly can be minimized to meet the trend of compact design of electronic products.
Abstract:
A portable fingerprint device is disclosed. The device includes an image sensing unit for capturing fingerprint images of a finger; a microprocessor, linked to the image sensing unit, for recording the fingerprint images of the finger, identifying the fingerprint images of the finger from a fingerprint database, receiving a command signal and transmitting a response signal; and a communication unit, connected to the microprocessor, for exchanging the command signal and the response signal between the microprocessor and a command device separated from the portable fingerprint device. The portable fingerprint device not only can identify fingerprints, but also can detect a sequence of finger motion, or “signature”, and use such information as part of the identification/authentication process.
Abstract:
A chip package having ESD protection and a method for making the chip are disclosed. The chip package includes a chip and a substrate. The chip includes a number of I/O pads each connected to a corresponding I/O contact via a first bonding wire. It also includes a number of ESD protective pads each connected to a corresponding ESD contact via a second bonding wire. Bonding wires connecting the ESD protective pads and the ESD contacts have vertexes closer to the top surface of the chip than the vertexes of the bonding wires connecting the I/O pads and the I/O contacts. Hence, a perfect ESD protection effect is achieved by leading the ESD through the bonding wires to the ESD contacts rather than via the I/O contacts.
Abstract:
A capacitive fingerprint sensing unit and enhanced capacitive fingerprint reader using the capacitive fingerprint sensing units are disclosed. The enhanced capacitive fingerprint reader includes a number of capacitive fingerprint sensing units, forming a fingerprint sensing array; a conductive element; and an excitation signal driver, for providing excitation signals to the conductive element. By increasing the thicknesses of a first inter-metal dielectric layer and a second inter-metal dielectric layer in fingerprint sensing units in the enhanced capacitive fingerprint reader, sensitivity of the enhanced capacitive fingerprint reader can be improved.
Abstract:
A capacitive image sensor and a method for running the capacitive image sensor are disclosed. The capacitive image sensor includes a number of capacitive sensing elements, forming an array, each capacitive sensing element for transforming a distance between a portion of a surface of an approaching finger and a top surface thereof into an output voltage, wherein a value of the output voltage is changed by a driving signal exerted on the finger; an A/D converter, for converting the output voltage into a number and outputting the number; and a signal source, for providing the driving signal to the finger.
Abstract translation:公开了电容式图像传感器和用于运行电容式图像传感器的方法。 电容式图像传感器包括形成阵列的多个电容感测元件,用于将接近的手指的表面的一部分与其顶表面之间的距离变换为输出电压的每个电容感测元件,其中输出的值 通过施加在手指上的驱动信号来改变电压; A / D转换器,用于将输出电压转换成一个数字并输出该数字; 以及用于向手指提供驱动信号的信号源。
Abstract:
An enhanced capacitive fingerprint sensing unit is disclosed. The enhanced capacitive fingerprint sensing unit includes a base structure and a fingerprint sensing structure. The fingerprint sensing structure has a first inter-metal dielectric layer, a second metal layer, a second inter-metal dielectric layer, a third metal layer, and a passivation layer. By connecting the third metal layer to Transient Voltage Suppressor (TVS) device, anti-Electrostatic Discharge (ESD) is available. By increasing the thicknesses of the first inter-metal dielectric layer and the second inter-metal dielectric layer, sensitivity of the enhanced capacitive fingerprint sensing unit can be improved.
Abstract:
A read-only method and a read-only system for operating a portable device are disclosed. The system includes a portable device which has a memory unit and a processing unit, and a host which has a display unit and a processor. A browser requests an access to a portable device inserted to a host. After the storage units been accessed are traced, corresponding service will be performed by the portable device without being blocked by the security system of the host.
Abstract:
A portable device having fingerprint recognition function includes an image sensing unit, a microprocessor, a signal transmitting unit, a carrying member, a cleaning unit, and a housing. It is characterized that the cleaning unit removes residual fingerprint from the image sensing unit while the carrying member moves in and out of the housing. The portable device of the present invention is free from fingerprint residue and can reduce security risks.