Abstract:
A package substrate having embedded capacitor is provided. The package substrate includes a first core circuit board, at least one embedded capacitor, a second core circuit board and a dielectric layer. The first core circuit board has at least one metal layer, and the first core circuit board has at least one first conductive through hole connected to the metal layer. At least one embedded capacitor is embedded in the first core circuit board and connected to the metal layer. The second core circuit board has at least one wiring layer, and the second core circuit board has at least one second conductive through hole connected to the wiring layer. The dielectric layer is laminated between the first core circuit board and the second core circuit board.
Abstract:
A manufacturing method of a circuit structure is provided as follows. Firstly, a base conductive layer is formed on the carrier board and a first patterned plating-resistant layer having at least one trench for exposing a part of the base conductive layer is formed on the base conductive layer. A first patterned conductive layer is then formed in the trench and a second patterned plating-resistant layer is formed which covers a part of the first patterned conductive layer and a part of the first patterned plating-resistant layer. A second patterned conductive layer is formed on the exposed first patterned conductive layer. The first and the second patterned plating-resistant layers and the base conductive layer exposed by the first patterned conductive layer are removed. Then, a patterned solder mask is formed for covering a part of the first patterned conductive layer.
Abstract:
A method of forming an integrated circuit package with an upward-facing chip cavity such that the fabrication of the substrate and the packaging of silicon chip are combined. By forming a patterned dielectric layer to expose bonding pads on a silicon chip and subsequently connecting the bonding pad on the chip with trace lines on the substrate through electroplating, reliable connections between the chip and substrate are formed and no more bubbles are formed inside the dielectric layer.
Abstract:
A chip package carrier is disclosed, which includes a first circuit layer, a second circuit layer, a core layer, a third circuit layer, a first dielectric layer between the first and third circuit layers, a fourth conductive layer including at least a solder ball pad, a second dielectric layer between the second and fourth circuit layers and at least a capacitor device, wherein the core layer has at least a first through-hole; the third circuit layer is disposed above the first circuit layer and includes at least a die pad; the capacitor device is disposed in the first through-hole. The capacitor device herein includes a first pillar electrode covering the wall of the first through-hole, a cylindrical capacitor material disposed in the first pillar electrode and having a first blind hole, and a second pillar electrode disposed in the first blind hole and connected to the die pad.
Abstract:
A method of manufacturing a build-up printed circuit board structure for increasing fine circuit density includes providing a core carrier board; forming a plurality of first conductive pads on a top surface of the core carrier board; forming a first dielectric layer on the core carrier board in order to cover the first conductive pads; drilling the first dielectric layer to form a patterned first electroplated layer on the first dielectric layer; forming a second dielectric layer, and the first dielectric layer and the patterned first electroplated layer being covered by the second dielectric layer; drilling the second dielectric layer and the first dielectric layer to form a patterned second electroplated layer on the second dielectric layer; and forming a third dielectric layer, and the second dielectric layer and the patterned second electroplated layer being covered by the third dielectric layer; and removing the core carrier board.
Abstract:
An automatically adjusting gain/bandwidth loop filter suitable for a digital phase lock loop or a digital adaptive carrier recovery loop with variable loop gain/bandwidth for rapid acquisition and lower steady-state jitter is provided. The automatically adjusting gain/bandwidth loop filter comprises a variable gain/bandwidth loop filter, a tracking status detector and a gain/bandwidth control state machine. The tracking status detector observes the frequency error which is the output of the frequency tracking (integral) branch of the variable gain/bandwidth loop filter, then it outputs a tracking state of the carrier recovery loop. The loop gain/bandwidth is then adjusted by the gain/bandwidth control state machine in response of the tracking state to improve the pull-in time and steady-state carrier frequency jitter.
Abstract:
A method of forming an integrated circuit package with a downward-facing chip cavity. A substrate comprising an insulating core layer and a conductive layer is provided. A through-hole is formed in the substrate and an adhesive tape is attached to the surface of the conductive layer. A silicon chip is attached to the exposed adhesive tape surface at the bottom of the first opening. The chip has an active surface and a back surface. The chip further includes a plurality of bonding pads on the active surface. The back surface of the chip is attached to the adhesive tape. A patterned dielectric layer is formed filling the first opening and covering a portion of the adhesive tape, the active surface, the bonding pad and the insulating core layer. The patterned dielectric layer has a plurality of openings that exposes the bonding pads and some through holes. A metallic layer is formed over the exposed surface of the openings and the upper surface of the patterned dielectric layer by electroplating. The adhesive tape is removed. The metallic layer and the conductive layer are patterned. A patterned solder resistant layer is formed over the metallic layer and the conductive layer. The patterned solder resistant layer has a plurality of openings that expose a portion of the conductive layer. A solder ball implant is conducted to form electrical connection between the solder balls and the conductive layer.
Abstract:
A novel electrical connector and method of manufacture is disclosed which provides an integral attachment and retention means for the purpose of electrically and mechanically interconnecting circuit elements in electronic devices, said circuit elements including but not limited to printed circuit boards, flexible printed circuits, rigid flex circuits, semiconductor package substrates, modules, and batteries. The electrical connector of the present invention utilizes a bonding material, disposed at least between the electrical spring contact elements on a surface of the connector, to bond and retain first and second portions of the electrical connector in an actuated state on a mating circuit element whereby stable and low resistance electrical interconnections are formed and maintained between the electrical connector and interconnection terminals on the mating circuit element. This design permits the electrical connector to be low-profile and use a reduced amount of space on a circuit member such as a PCB.
Abstract:
A novel interconnection structure and method of manufacture is provided which provides an improved means of interconnecting external connector interfaces, such as Universal Serial Bus (USB) connectors, to the internal system boards of electronic devices, such as laptop computers, tablets, and mobile phones. An external connector interface used for interconnecting separate electronic devices is connected to the internal system board of the device in which it resides by being interconnected mechanically and electrically, or alternatively being integral to and of a unitary structure with, a printed circuit substrate, said printed circuit substrate having a plurality of conductive, elastic spring contacts mounted on one surface, with at least one of said electrical spring contacts electrically interconnected to the external electrical connections of the USB connector, and said electrical spring contacts providing an electrical interconnection means to a system board inside the electronic device.This structure improves upon the state of the art by reducing the number and complexity of interconnection interfaces, reducing signal degradation, allowing higher data transfer rates, and improving reliability of the interconnections.The interconnection of the USB substrate to the system board may be separable, re-mountable, and re-connectable, and may be accomplished with a normal-force actuated connector.
Abstract:
A circuit structure suitable for being disposed on a carrier board. The circuit structure comprises a first patterned conductive layer, a second patterned conductive layer, and a solder mask. The first patterned conductive layer is disposed on the carrier board. The second patterned conductive layer is disposed on a part of the first patterned conductive layer. A part of the edge of the second patterned conductive layer and a part of the edge of the first patterned conductive layer are substantially coplanar. The patterned solder mask covers a part of the first patterned conductive layer and has at least one opening for exposing the second patterned conductive layer and a part of the first patterned conductive layer adjacent to the second patterned conductive layer.