3175results about How to "Avoid warping" patented technology

In order to fabricate a high performance thin film semiconductor device using a low temperature process in which it is possible to use low price glass substrates, a thin film semiconductor device has been fabricated by forming a silicon film at less than 450 DEG C., and, after crystallization, keeping the maximum processing temperature at or below 350 DEG C. In applying the present invention to the fabrication of an active matrix liquid crystal display, it is possible to both easily and reliably fabricate a large, high-quality liquid crystal display. Additionally, in applying the present invention to the fabrication of other electronic circuits as well, it is possible to both easily and reliably fabricate high-quality electronic circuits.

A substrate for a semiconductor device and a manufacturing thereof, and a semiconductor device using the same and a manufacturing method thereof are disclosed. For example, in the substrate according to the present invention, a core is eliminated, so that the substrate has a very thin thickness, as well, the length of electrically conductive patterns becomes shorter, whereby the electrical efficiency thereof is improved. Moreover, since a carrier having a stiffness of a predetermined strength is bonded on the substrate, it can prevent a warpage phenomenon during the manufacturing process of the semiconductor device. Furthermore, the carrier is removed from the substrate, whereby a solder ball fusing process or an electrical connecting process of the semiconductor die can be easily performed.

An improved, conductive, polymeric composition comprises a polymeric resin; an electrically conductive filler system comprising small carbon fibers and either carbon powder or fibrous non-conductive filler or a combination of both. The amount of the conductive filler system utilized is dependent upon the desired electrical conductivity (surface and volume conductivity or resistivity) while preferably preserving intrinsic properties of the polymeric resin such as impact, flex modulus, class A finish, and the like. The conductive articles made from these compositions can therefore be used for electromagnetic shielding, electrostatic dissipation or antistatic purposes in packaging, electronic components, housings for electronic components and automotive housings.

There is provided a supporting plate having a structure in which a solvent can be supplied to an adhesive layer between the supporting plate and a substrate such as a semiconductor wafer in a short period of time after the substrate is thinned, and also a method for stripping the supporting plate. The supporting plate may have a larger diameter than the semiconductor wafer, and penetrating holes are formed in the supporting plate. The outer peripheral portion of the supporting plate is a flat portion in which no penetrating hole is formed. When alcohol is poured from above the supporting plate, the alcohol reaches the adhesive layer through the penetrating holes, dissolves and removes the adhesive layer.

A method of forming a stack of thin wafers provides a wafer level stack to greatly reduce process time compared to a method where individually separated chips are stacked after a wafer is sawed. A rigid planar wafer support member stabilizes and planarizes each wafer while it is thin or its thickness is reduced and during subsequent wafer processing. Thinned wafers are stacked and the external support members are removed by applying heat or ultraviolet (UV) light to an expandable adhesive layer between the support members and the thin wafers. The stacked wafers then can be further processed and packaged without thin-wafer warping, cracking or breaking. A wafer level package made in accordance with the invented method also is disclosed.

The present invention provides a semiconductor device package comprising a substrate with at lease a pre-formed die receiving cavity formed and terminal contact metal pads formed within an upper surface of the substrate. At lease a first die is disposed within the die receiving cavity. A first dielectric layer is formed on the first die and the substrate and refilled into a gap between the first die and the substrate to absorb thermal mechanical stress there between. A first re-distribution layer (RDL) is formed on the first dielectric layer and coupled to the first die. A second dielectric layer is formed on the first RDL, and then a second die is disposed on the second dielectric layer and surrounded by core pastes having through holes thereon. A second re-distribution layer (RDL) is formed on the core pastes to fill the through holes, and then a third dielectric layer formed on the second RDL.

A method of manufacturing a substrate with through electrodes of the present invention, includes the steps of forming a metal post over a temporal substrate in a state that the metal post is peelable from the temporal substrate, placing a normal substrate in which a through hole is provided in a position corresponding to the metal post over the temporal substrate, whereby inserting the metal post on the temporal substrate into the through hole in the normal substrate, and obtaining a through electrode that is formed of the metal post passing through the normal substrate by peeling the temporal substrate from the metal post.

A photovoltaic element which directly converts an optical energy such as solar light into an electric energy. After many uneven sections are formed on the surface of an n-type crystalline silicon substrate (1), the surface of the substrate (1) is isotropically etched. Then the bottoms (b) of the recessed sections are rounded and a p-type amorphous silicon layer (3) is formed on the surface of the substrate (1) through an intrinsic amorphous silicon layer (2). The shape of the surface of the substrate (1) after isotropic etching is such that the bottoms of the recessed sections are slightly rounded and therefore the amorphous silicon layer can be deposited in a uniform thickness.

An apparatus used in a process for supporting a printed circuit board during a wave soldering operation including a frame with a frame opening in which a surface of the frame supports the board and also serves as a reference surface for vertically positioning the board above the solder pool. The board is secured against the reference surface with spring loaded clamps. Stiffeners preferably being an aluminum extrusion having a Tee or angle cross section is mounted along the outside edge of the reference surface of the frame and has a second reference surface facing in a direction opposite the reference surface of the frame. The second reference surface on the extrusion is accessible for support by a slide rail so that the height of the reference surface of the frame above the surface of the pool is independent of the thickness of the board or frame. A board support bar for minimizing warpage of the board from heat is disclosed as well as a hold down bar that secures components on the board so that they do not float away when contacted by the solder wave.

A card cartridge includes a housing having a pair of opposing side walls, a top, a front wall, a back wall opposite the front wall, and a base. The housing includes an interior cavity that is sized to accommodate a stack of cards, a card access, and a card output slot. The card access allows a card transport mechanism to engage a lead card contained in the housing and feed the lead card through the card output slot.

A packaging process for a semiconductor chip that includes the following steps. A carrier having an upper surface and a corresponding lower surface is provided. A photoresist layer is formed on the upper surface of the carrier. A plurality of photoresist openings that expose the carrier is formed in the photoresist layer. A plurality of openings that connects with the photoresist openings are formed in the carrier. A tape is attached to the lower surface of the carrier. The body is filled into the openings of the carrier. A chip is mounted onto the upper surface of the carrier and electrically connected therewith. Finally, the tape is removed from the lower surface of the carrier.

A flip chip substrate structure and a method to fabricate thereof are disclosed. The structure comprises a build up structure, a first solder mask and a second solder mask. Plural first and second electrical contact pads are formed on the first and second surface of the build up structure, respectively. A first solder mask having plural openings is formed on the first surface of the build up structure, and the openings expose the first electrical contact pads, wherein the aperture of the openings of the first solder mask are equal to the outer diameter of the first electrical contact pads. A second solder mask having plural openings is formed on the second surface of the build up structure, and the openings expose the second electrical contact pads, wherein the aperture of the openings of the second solder mask are smaller than the outer diameter of the second electrical contact pads.

A wiring substrate includes a frame-shaped reinforcing plate in which an opening portion is provided in a center portion, an interposer arranged in the opening portion of the reinforcing plate and having such a structure that a wiring layer connected mutually via a through electrode is formed on both surface sides of a substrate respectively, a resin portion filled between a side surface of the interposer and a side surface of the opening portion of the reinforcing plate, and coupling the interposer and the reinforcing plate, and an n-layered (n is an integer of 1 or more) lower wiring layer connected the wiring layer on the lower surface side of the interposer to extend from the interposer to an outer area.

An electronic component mounting base board has an insulating substrate provided with a conductor circuit and a mount portion for an electronic component, and a heat slug adhered to the insulating substrate, wherein the heat slug is comprised of a flat main body and a projection portion extending vertically from a side face of the main body, and provided with a slit deforming portion absorbing deformation of the insulating substrate.

An electronic component embedded substrate and a method for manufacturing the substrate are disclosed. The electronic component embedded substrate includes a substrate main body and an electronic component embedded in the substrate main body. The center plane of the electronic component in the thickness direction thereof and the center plane of the substrate main body in the thickness direction thereof generally match each other.

A flip-chip semiconductor device is proposed, including a substrate, a plurality of stiffeners disposed at peripheral areas of the substrate, with a gap formed between each of the adjacent stiffeners; at least a semiconductor chip mounted on an area of the substrate surrounded by the stiffeners via flip-chip technique; and a beat sink attached to the semiconductor chip. By such arrangement, warpage of the semiconductor device may be prevented. As an opening is formed at an appropriate position of the stiffener structure, distortion of the stiffener may be avoided. Further, as the beat sink is not attached to the stiffener, solder bumps may be free from thermal stress due to mismatch in coefficient of thermal expansion between the heat sink and the substrate while preventing delamination of the heat sink caused by thermal stress.