摘要:
The present invention provides a packaged substrate which has a superior positioning accuracy of wiring formed on a circuit substrate made of ceramics, and a conductive pattern with a thick film and yet a fine pattern. On a surface of flexible base member made of plastic, fine grooves are formed in a pattern corresponding to a first conductive pattern so that a cavity face is produced. Conductive paste is filled and into the grooves on this cavity face, and then dried. The cavity face and a circuit substrate are pasted with each other by applying predetermined heat and pressure. A pattern of the dried conductive paste is transcribed onto the circuit substrate, and then the first conductive pattern is formed by firing. A first ball solder is coupled with a second conductive pattern which is coupled to the first conductive pattern through an electrode in a through-hole of the circuit substrate.
摘要:
A module component with a good shield effect and a low height including a circuit board having mounted thereon a mount device including an electronic part. The device is sealed with a sealing body having a metal film formed on the sealing body surface. A ground pattern is formed at the outer periphery of the principal surface of the circuit board. The metal film is conductively connected with the ground pattern.
摘要:
A module includes a component, a circuit board having the component mounted thereon, a first grounding pattern formed on an outermost periphery of a surface portion of the circuit board; a first sealer provided on the circuit board and having a dimension projected on the circuit board, and a metal film covering the sealer and connected to the grounding pattern. The dimension of the first dealer is smaller than an outside dimension of the circuit board. The first sealer is made of first resin and sealing the component. The module has a low profile and is adequately shielded.
摘要:
A module includes an electronic component having at least two electrodes, a board having electrodes on its surface to be connected to the electrodes of the electronic component, respectively, solders for connecting the electrodes of the electronic component to the electrodes of the board, respectively, an insulating resin covering the electronic component, the surface of the board, the solder, and the electrodes, and solder resists provided on the surface of the board and around the electrodes of the board, respectively. One of the solder resists is separated from the other electrode at a portion between the electronic component and the board. When this module is mounted on a motherboard, the solder does not flow out of the electrodes even when the solder in the insulating resin melts.
摘要:
A multilayer ceramic substrate has a first conductive pattern that is transfer-printed on a ceramic substrate using an intaglio plate made of a flexible resin. The intaglio plate has a plurality of grooves with different depts. A first insulation layer is on the first conductive pattern, and a second conductive pattern is on the insulating layer. The two conductive patterns are coupled by a via.
摘要:
A module component which includes circuit substrate 3 having one or more components 1 on at least one of the surfaces, and junction circuit substrate 5 having hollow 4, or hole, disposed corresponding to the portion of the one or more components 1 mounted on the one surface of circuit substrate 3 for fitting the mounted components 1 in. These substrates are laminated to form a single body so that mounted components 1 is contained within the inside. The above configuration ensures high reliability in the layer-to-layer connection, and enables to mount a plurality of components densely with a high dimensional accuracy. Thus a highly reliable compact module component is offered.
摘要:
A small radio-frequency hybrid switch module is provided for switching between transmitted signals and received signals in plural frequency bands. This module includes: a laminated body including a dielectric layer; a diplexer; a switching circuit; a low pass filter (LPF); a conductive pattern provided on the dielectric layer for forming at least one of the diplexer, the switching circuit and the LPF; a surface acoustic wave (SAW) filter mounted on the laminated body; a cover provided on the SAW filter for forming a cavity which allows surface acoustic wave vibration and for hermetically sealing the cavity; and a semiconductor switching device mounted on the laminated body for forming a part of the switching circuit.
摘要:
A circuit board is manufactured by filling a via-hole formed in an insulating substrate with conductive material, disposing conductive layers on both sides of the insulating substrate, and forming alloy of component material of the conductive material with component material of the conductive layers. In the circuit board, therefore, the conductive material filled in the via-hole formed in the insulating substrate is securely connected electrically as well as mechanically to the conductive layers on both sides of the insulating substrate with high reliability.
摘要:
The present invention provides a method of manufacturing a low-temperature sintering multilayer ceramic wiring board comprising the steps of: forming a wiring layer by printing conductive paste (4) on an unfired green sheet (1); forming a laminate by laminating, on at least one side of a ceramic substrate, the unfired green sheet having the wiring layer; and firing the laminate. The present invention also provides paste for use with this method. In the firing step, after an adhesive layer (8) or binder resin in said green sheet used for lamination burns, glass ceramic in the green sheet starts to sinter, and upon or after the start of sintering of the glass ceramic, conductive particles in the conductive paste starts to sinter. This manufacturing method can provide an precise wiring board without pattern deformation and also provide a low-temperature ceramic multilayer wiring board that has no cracks in the glass ceramic on the periphery of electrodes and has electrodes of a dense film structure.
摘要:
A module includes an electronic component having at least two electrodes, a board having electrodes on its surface to be connected to the electrodes of the electronic component, respectively, solders for connecting the electrodes of the electronic component to the electrodes of the board, respectively, an insulating resin covering the electronic component, the surface of the board, the solder, and the electrodes, and solder resists provided on the surface of the board and around the electrodes of the board, respectively. One of the solder resists is separated from the other electrode at a portion between the electronic component and the board. When this module is mounted on a motherboard, the solder does not flow out of the electrodes even when the solder in the insulating resin melts.