Abstract:
Disclosed is a structure for precision control of electrical impedance of signal transmission circuit board. A substrate forms thereon a plurality of first signal transmission lines, and a first covering insulation layer is formed on a first surface of the substrate to cover a surface of each first signal transmission lines and each spacing section formed between adjacent first signal transmission lines. Each first signal transmission lines can transmit a differential mode signal or a common mode signal. At least one first flattening insulation layer is formed between a surface of the first covering insulation layer and a first conductive shielding layer so that the first flattening insulation layer fills up the height difference between the surface of each first signal transmission line and the spacing section associated with each first signal transmission line to thereby ensure a consistent distance between the signal transmission lines and the conductive shielding layer for realizing precision control of electrical impedance of the signal transmission circuit board.
Abstract:
A bundled flexible circuit cable with water resistant structure is provided, in which a flexible substrate forms a cluster section having a lap section. In the lap section, a plurality of flat cable components that collectively form the cluster section is arranged to stack by substantially paralleling each other and corresponding up and down and is bonded and positioned by being applied with an adhesive material. The flat cable components are enclosed by a water resistant component at the lap section, whereby water, liquids, and contaminants are prevented from moving through gaps present in the bundled flexible substrate to get into the enclosure of an electronic device so as to realize protection against water, humidity, and dust. A tubular member or a wrapping member is further provided to fit over a section of the cluster section other than the lap section in order to facilitate extension through a holed mechanism device, such as a hinge, and to improve resistance against flexing and bending. The adhesive material can be a material containing conductive particles therein. Further, the substrate of the flexible circuit cable can be of such a design that a shielding layer is included and in electrical connection with a grounding line, whereby the shielding layer enclosing each of the lapped flat cable components in the water resistant structure is electrically connected to the water resistant component containing a conductive substance or the device enclosure to realize protection against electromagnetic interference.
Abstract:
The present invention discloses a sampling component comprising a sampling body that can be electrically heated and the outer surface of which has a wiping sampling area; and an insulated handle that is connected with one longitudinal end of the sampling body. The sampling component according to the present invention contacts directly the contacts of an external power supply after being disposed in a analysis chamber, the power supply is turned on to heat the sampling body so as to realize sample pyrolysis, and the power is turned off immediately after the sampling component is taken away. Thus, the power supply of the sampler can work discontinuously so that the power consumption of the system is reduced, meanwhile, the system malfunction caused by a long-term work of the sampling device under a high temperature can be avoided. The present invention further discloses a sampling device having said sampling component and an ion mobility spectrometer having the sampling device.
Abstract:
A cable bundling device includes a cable positioning and a wrapping mechanism. The cable positioning mechanism includes a first clamping member and a second clamping member, which are set in a working zone. The first and second clamping members function to respectively clamp ends of a cable. One of the wrapping mechanism and the cable positioning mechanism is selectively rotatable to have the bundling material loaded in the wrapping mechanism wrapped around the cable.
Abstract:
Provided is a circuit board based connector with raised projection section, which is formed by applying substrate bonding and formation techniques to make a connector that features a raised projection section. The circuit substrate has an end that is provided with conductive terminals and an opposite end that is provided with flat cable connection terminals for connection with a flat cable. The circuit substrate has a first surface on which the projection section is formed. A shielding layer covers the projection section and a portion of the first surface. The circuit substrate has a second surface on which a second shielding layer is selectively formed. When the circuit substrate is inserted into an insertion space defined in a connection socket with the conductive terminals thereof, the shielding layer and the projection section of the circuit substrate are put into engagement with and thus retained by the insertion space of the connection socket to thereby fix within the connection socket.
Abstract:
An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values by multiplying the subcarrier values by a preamble code. A correlator calculates a plurality of differential correlations in the code-demodulated signal. An IFFT processor IFFT-processes the differential correlations by mapping the differential correlations to subcarriers. A maximum value detector detects a maximum value from the IFFT signal and calculates a timing offset using an IFFT output index having the maximum value.
Abstract:
A method for providing discount information and the system thereof are provided. The method includes acquiring an identifier of a selected item and coordinates of the client device, searching for items relevant to the selected item in a storage system, and refining the search results according to the coordinates of the client device. The method further includes sending corresponding discount information of the search results to the client device if at least one item in the storage system is determined to be relevant to the selected item.
Abstract:
A trace detector is disclosed. The trace detector comprises: a desorption chamber defining a desorption region, and the desorption chamber has a housing. The housing has a sample feeding port for introducing a substance to be detected into the desorption chamber and a gas discharge port for discharging gas entraining the sample from the desorption chamber. A controller is used for controlling the trace detector in such a manner that the sample feeding port and the gas discharge port are in fluid communication with the desorption chamber during pre-concentration process of the trace detector, thereby continuously feeding and collecting the sample. With the above manner, data collecting, processing and analyzing processes may be performed by the trace detector throughout the sample feeding process and the gas pre-concentrating process. The trace detector has an excellent detecting period of time whether the substance to be detected in the gas is in a high concentration state or a low concentration state, and the trace detector can perform continuous sampling for a long time, thereby improving a ratio of the amount of trapped substance to the amount of the substance entrained in the gas to be detected and the amount of the cumulated trapped substance, decreasing the probability of failing to detect the substance, and increasing detection sensitivity. In addition, the detection efficiency of the detector is increased during the gas pre-concentration process.
Abstract:
An etchant for removing a porous low-k dielectric layer on a semiconductor substrate includes a hydrofluoric acid-based solvent, a dilating additive for dilating the pores in the porous low-k dielectric, and a passivating additive that forms a passivation layer at the interface between the low-k dielectric layer and the semiconductor substrate.
Abstract:
A method for forming a shallow trench isolation (STI) structure with a predetermined target height is provided. A substrate having a pad oxide layer formed on the substrate is provided. A nitride-containing layer with a thickness is formed on the pad oxide. A STI structure is formed and extends through the nitride-containing layer, the pad oxide layer, into the substrate. The thickness of the nitride-containing layer is measured to calculate the height of STI structure according to a correlation between the thickness of the nitride-containing layer and the height of STI structure. A thickness of the top portion STI structure to be removed is determined according to the difference between the height of the STI structure and the predetermined target height and is removed in a first etching process. The nitride-containing layer is removed without etching the STI structure or the pad oxide layer in a second etching process.