摘要:
A method of manufacturing a package module structure of a high power device using a metal substrate that can improve reliability by minimizing stress due to a thermal expansion coefficient difference between a metal substrate and a semiconductor device includes: preparing a metal substrate; forming an oxide layer by selectively anodizing the metal substrate; forming a mounting groove for mounting a semiconductor device by etching a portion of the oxide layer; installing a shock-absorbing substrate that is made of a material having a thermal expansion coefficient in a range similar to a material of a semiconductor device to expose the entirety or a portion of a bottom portion of the mounting groove; mounting the semiconductor device in the shock-absorbing substrate exposed to the mounting groove; and electrically connecting an electrode terminal of the semiconductor device and an electrode line formed in an upper surface of the oxide layer.
摘要:
The present disclosure relates to a WDM-PON optical transmitter; and, more particularly, to a system for controlling a driving current of the WDM-PON optical transmitter. The present disclosure provides a driving current control system of an optical transmitter for use in WDM-PON including a plurality of optical transmitters, each transmitter generating and transmitting a transmittance optical signal based on a driving current and an optical multiplexer/demultiplexer for combining the optical signals received from the plurality of the optical transmitters to output a combined optical signal through a single common terminal, wherein the driving current is controlled based on the combined optical signal outputted from the common terminal.
摘要:
The present invention relates to an elastic support module and a rack bar supporting device for a vehicle steering apparatus, which includes the elastic support module. By the present invention, it is possible to prevent a noise from being produced due to the increase of a clearance caused when a vehicle loses the driving durability thereof to a certain degree and hence a support yoke of the vehicle is worn, or due to an impact reversely input from a road surface, and hence to provide a pleasant steering feeling for a driver when steering the vehicle.
摘要:
The present invention relates to a rack bar supporting device for a vehicle steering apparatus. According to the present invention, a clearance between the rack bar and a support yoke can be kept always constant when the vehicle steering apparatus is operated, which makes it possible to reduce operational friction and noise, to maintain the supporting force of the support yoke and the rack bar to be constant for a long time, and to improve a steering feeling of a driver.
摘要:
Provided is a three-dimensional aluminum package module including: an aluminum substrate; an aluminum oxide layer formed on the aluminum substrate and having at least one first opening of which sidewalls are perpendicular to an upper surface of the aluminum substrate; a semiconductor device mounted in the first opening using an adhesive; an organic layer covering the aluminum oxide layer and the semiconductor device; and a first interconnection line and a passive device circuit formed on the organic layer and the aluminum oxide layer.
摘要:
A method for manufacturing passive devices and semiconductor packages using a thin metal piece is provided. According to the method, an adhesive layer is formed on a dummy substrate; a thin metal piece is bonded on the adhesive layer; a masking material is attached to the thin metal piece, a dielectric layer is formed; a masking material is attached to form metal pads; a metal pad is formed, and the formed device is attached to a lower substrate using the metal pads; the adhesive layer and the dummy substrate are removed, a masking material is attached on a surface exposed, a region where passive devices are to be formed is patterned, and the thin metal piece is etched at a predetermined depth; and solder bumps for surface mounting are formed.
摘要:
The invention is related to an injection light generator for use in a wavelength division multiplexed-passive optical network, which generates A-band injection light having a spectrum range separated into N wavelength ranges (N is a natural number equal to or greater than 2) to be used for a transmission of a downstream optical signal and B-band injection light having a spectrum range separated into N wavelength ranges to be used for a transmission of an upstream optical signal.
摘要:
The present invention relates to a terminal-integrated package method for a metal base package module that can effectively prevent short-circuit or breakage by not using wire bonding for connection with an external circuit.The terminal-integrated package method for the metal base package module includes: preparing a metal substrate formed with a conductive metal material; forming an oxide layer by oxidizing one side of the metal substrate to a predetermined depth; forming an insulation groove by partially eliminating the metal substrate to the oxide layer with a constant width along the circumference of the metal substrate from an opposite side of the metal substrate; forming a plurality of external connection terminals by forming a separation groove by eliminating a circumference portion of the metal substrate, disconnected with a center portion thereof by the insulation groove along the circumference with a predetermined gap; mounting or manufacturing an electronic part on the metal substrate or the oxide layer; and electrically connecting an electrode of the electronic part with the external connection terminal.
摘要:
A method of manufacturing a package module structure of a high power device using a metal substrate that can improve reliability by minimizing stress due to a thermal expansion coefficient difference between a metal substrate and a semiconductor device includes: preparing a metal substrate; forming an oxide layer by selectively anodizing the metal substrate; forming a mounting groove for mounting a semiconductor device by etching a portion of the oxide layer; installing a shock-absorbing substrate that is made of a material having a thermal expansion coefficient in a range similar to a material of a semiconductor device to expose the entirety or a portion of a bottom portion of the mounting groove; mounting the semiconductor device in the shock-absorbing substrate exposed to the mounting groove; and electrically connecting an electrode terminal of the semiconductor device and an electrode line formed in an upper surface of the oxide layer.
摘要:
The present invention relates to a terminal-integrated package method for a metal base package module that can effectively prevent short-circuit or breakage by not using wire bonding for connection with an external circuit.The terminal-integrated package method for the metal base package module includes: preparing a metal substrate formed with a conductive metal material; forming an oxide layer by oxidizing one side of the metal substrate to a predetermined depth; forming an insulation groove by partially eliminating the metal substrate to the oxide layer with a constant width along the circumference of the metal substrate from an opposite side of the metal substrate; forming a plurality of external connection terminals by forming a separation groove by eliminating a circumference portion of the metal substrate, disconnected with a center portion thereof by the insulation groove along the circumference with a predetermined gap; mounting or manufacturing an electronic part on the metal substrate or the oxide layer; and electrically connecting an electrode of the electronic part with the external connection terminal.