Abstract:
A structural configuration and manufacture method is applied to manufacture electronic circuits on a ceramic substrate including capacitor and inductors for filters. The electronic circuits have strong bonding to securely adhere to the SOG-coated substrate when the SOG is cured at an elevated temperature supplemented with high nitrogen flow during the curing process. The SOG coated ceramic substrate shows excellent layer compatibilities during temperature variations because reduced differences of thermal coefficients between different layers.
Abstract:
This invention discloses an inductor that includes a conducting wire composed of an alloy having temperature coefficients of resistance (TCR) approximately 0.0002 milliohm per Celsius degree or is lower. The inductive coil has a winding configuration provided for enclosure in a substantially rectangular box with a mid-plane extended along an elongated direction of the rectangular box wherein the conducting wire interesting at least twice near said mid-plane.
Abstract:
This invention discloses a method for manufacturing an inductor by first press punching a first and a second layer of conductive plates into a first and second coil layers with a first and second inductor lead layers as single integrated layers. The manufacturing process further includes a step of overlapping and connecting the first and second coil layers to form an inductor. In a preferred embodiment, process of manufacturing further includes a step of mixing epoxy to bond with a highly magnetic material and pressure molding the bonding magnetic material around the coil layers to form an inductor.
Abstract:
The present invention discloses a surface-mount resistance-temperature-detector (RTD) supported on a substrate. The surface-mount RTD includes a resistive strip disposed on a top surface of the substrate having a substantially linear temperature resistance coefficient (TCR) over a predetermined temperature range for measurement. The surface-mount RTD further includes two top terminals disposed on two opposite end on the top surface of the substrate wherein each of the top terminal connected to one end of the resistive strip. The surface-mount RTD further includes two bottom terminals disposed on a bottom surface of the substrate wherein each of the bottom terminals is disposed below one of the top terminals. The surface-mount RTD further includes two edge conductive plates each disposed on an edge surface of the substrate connected to one of the top terminals to a corresponding bottom terminal below. The surface-mount RTD further includes two surface mount solder electrodes wherein each solder electrode constituting a conductive layer overlying the top terminal, the edge conductive plate and the bottom terminal provided for performing a surface-mount soldering operation thereon. In a preferred embodiment, the surface-mount RTD further includes a passivation protective layer covering and protecting the resistive strip. In a preferred embodiment, the surface-mount RTD further includes two terminal-solder buffer pastes each disposed on top of the top surface terminal under the surface-mount solder electrode for buffering the top terminal and the solder electrode. In a preferred embodiment, the resistive strip is a platinum resistive strip having a temperature coefficient of resistance (TCR) ranging from 3000 to 3900 ppm/.degree.C.
Abstract:
The present invention discloses a resistive circuit. The resistive circuit includes a plurality of resistor networks disposed on a substrate. The resistor networks also includes a plurality of resistive circuit elements. The resistor networks further includes a plurality of termination contacts each connected to one of the resistive circuit elements. Each of the termination contacts is disposed on an edge of the substrate and each of the termination contacts is separated from a next termination contact by an edge trench disposed on the edge of the substrate whereby a distance across the edge trench defining a pitch between the termination contacts.
Abstract:
A filter circuit that includes a thin film layer supported on a substrate serving as a medium layer for a capacitor formed between a top electrode layer and a bottom electrode layer formed above and below the thin film layer. The top electrode layer is patterned into microstrips for functioning as an inductor for the filter circuit.
Abstract:
The present invention discloses a method for manufacturing a surface mount resistance-temperature-detector (RTD) on a substrate. The manufacture method includes the steps of (a) depositing a resistive thin film on a top surface of the substrate having a substantially linear temperature resistance coefficient (TCR) over a predetermined temperature range for temperature measurement; (b) patterning the resistive film into a plurality of resistive strips and a plurality of top terminals near two opposite edges on the top surface of the substrate with each resistive strip connected between two top terminals; (c) forming a bottom electrode on a bottom surface of the substrate underneath each of the top terminals; (d) depositing two edge conductive plates on edge surfaces of the substrate for connecting one of the top terminals to a bottom terminal thereunder; and (e) forming two surface mount solder electrodes with a conductive layer overlying the top terminal, the edge conductive plate and the bottom terminal provided for performing a surface-mount soldering operation thereon.
Abstract:
A fuse element comprises a substrate having a top surface, a bottom surface opposite to said top surface, and side surfaces, a heat insulation layer including a first surface and a second surface opposite to said first surface, said first surface of said heat insulation layer disposed on said top surface of said substrate, and said second surface having a surface roughness, a protective layer disposed above said heat insulation layer, and a fuse layer disposed between said heat insulation layer and said protective layer.
Abstract:
This invention discloses a current detector formed on a multiple-layered structure with a resistor supported thereon. The multiple-layered structure further includes a heat dissipation layer for dissipating heat generated from the resistor. In a preferred embodiment, the current detector further includes conductive blocks formed by a microelectronic casting process for functioning as part of electrodes for the current detector. In another preferred embodiment, the current detector further includes wrapping around electrodes each with a side conductive surface wrapping around a side surface of the multiple-layered structure.
Abstract:
This invention discloses an inductor includes a conducting wire having a winding configuration provided for enclosure in a substantially rectangular box with a mid-plane extended along an elongated direction of the rectangular box wherein the conducting wire interesting at least twice near said mid-plane.