摘要:
A method of making a pad array chip carrier package is disclosed. A semiconductor device (10) is bonded to a ceramic substrate (12). The semiconductor device may be attached to the substrate by wirebonding, tab bonding or flip chip bonding. The bonded assembly (16) is then attached to a flexible temporary support substrate (18) by means of an adhesive (19). The entire assembly is then placed into a mold cavity (20 and 22) and registered against the temporary support substrate (18). Plastic material (30) is molded about the semiconductor device and associated wirebonds in order to encapsulate the device. After removal from the mold, the encapsulated assembly is removed from the temporary support substrate (18) by peeling the temporary support substrate (18) from the circuit substrate.
摘要:
A die pad (108) with a punched hole providing a throughway (110) is affixed upon the chip carrier base 100. Such throughway permits the electronic interconnection of the die backside (112) to a conductive runner (104) by electrically conductive material (110) set between the die backside (112) and the conductive runner (104).
摘要:
An integrated circuit package includes a stacked integrated circuit chip arrangement (140) placed on a circuit substrate. The stacked IC chip arrangement includes a first IC chip (110) and a second IC chip (120), each having an array of terminals (116, 126) and being positioned in a face-to-face manner. An interposed substrate (130) is positioned between the first IC chip (110) and the second IC chip (120) such that circuitry disposed on the interposed substrate (130) provides electrical connection among the arrays of terminals of the first IC chip (110) and the second IC chip (120) and external circuitry.
摘要:
An integrated circuit package (10) comprises a semiconductor die (14) having a top surface and a bottom surface, and a substrate (16) for receiving the semiconductor die. The substrate should have an aperture(s) (18) below the semiconductor die for providing moisture relief during temperature excursions. An adhesive (20) applied to the substrate allows for mounting the semiconductor die to the substrate. Then, the semiconductor die is wirebonded to the substrate. Finally, an encapsulant (12) for sealing the top surface of the semiconductor die is formed over the semiconductor die and portions of the substrate.
摘要:
A shielded semiconductor package and a method for manufacturing the package is provided. The shielded semiconductor package comprises a substrate (10) having a metallization pattern (12, 13), with one portion of the metallization pattern being a circuit ground (13). A semiconductor device (16) is electrically interconnected (17) to the metallization pattern (12). A perforated metal shield or screen (18) covers the semiconductor device (16) and is electrically and mechanically attached to the metallization circuit ground (13) in order to shield the semiconductor device (16) from radio frequency energy. A resin material (14) is transfer molded about the semiconductor device, the electrical interconnections, and the metal screen to form the completed package.
摘要:
A grid array assembly method uses a flex circuitry substrate and includes providing a series of conforming flex circuitry substrates, the flex circuitry substrates include bonding pads and metallization on a first surface and, holes or vias in the substrate which define a contact pad array on the opposite surface. The substrates are tested and acceptable, then mounted on a carrier strip with longitudinally aligned apertures. The carrier strip is typically a metal such as copper. The strip with mounted substrates is then passed to a station where an IC die is mounted on the substrate first surface, wire bonds are placed from the die to the bonding pads, and the assembly is encapsulated by auto-molding to form a package body. Subsequently, interconnecting bumps are placed on the contact pads and the assembly is removed from the strip.
摘要:
An overmolded semiconductor package (150) is formed by electrically and mechanically attaching a semiconductor device (100) to a substrate (110) having at least one hole (130). A plastic molding compound (140) is overmolded around the semiconductor device 100) so as to encapsulate the device, the molding compound (140) extending at least partially into the substrate hole (130) to form an anchor (135) to aid in bonding the molding compound to the substrate. An alternate embodiment of the invention forms a pedestal (449) from the portion of the molding compound extending beyond the surface of the substrate. The pedestal functions as an anchor to aid in bonding the molding compound (440) to the substrate, and also as a spacer to maintain a preselected clearance between the substrate (410) and the printed circuit board (460). The portion of the molding compound extending beyond the surface of the substrate may also be used to form an alignment pin (548). The pin functions as an anchor to aid in bonding the molding compound to the substrate, and also as an alignment aid to maintain positional relationships between the substrate and the printed circuit board. In another embodiment of the invention, the overmolded semiconductor is mounted directly on a printed circuit board containing other active circuitry.
摘要:
A grid array assembly is provided employing a thin copper or steel carrier frame having apertures extending longitudinally of the frame. A series of semi-flexible substrate printed circuit boards are mounted in seriatim to peripheral edges of the apertures, the circuit boards including bonding pads and metallization on a first surface and conductive vias in the circuit boards extending to a second opposite surface containing a contact pad array. The carrier strip with the mounted circuit boards are passed to a station where an IC die is mounted on the board first surface, wire bonds are placed from the die to the bonding pads and the assembly encapsulated using a portion of the carrier strip as a mold gate to form a package body. Subsequently each grid array assembly is singulated from the carrier strip.
摘要:
A flexible film is made into a substrate (100) having metallization patterns. A semiconductor device (106) is affixed to the substrate, and the assembly is heated to expand the substrate. A cover (110) is attached to the substrate, over the device (106). Upon cooling, the substrate (100) shrinks and becomes taut and planar within the reinforced area. Alternatively, a reinforcing ring (210) can be attached to the substrate (200) either before or after attachment of the semiconductor device (206).
摘要:
A method of manufacturing a chip carrier from a universal ceramic substrate provides for a universal ceramic substrate having first and second opposed sides and an array of conductively filled through-holes. On the first side, wire bond pads and conductors connected to the conductively filled through-holes are provided as required. Similarly, on the second side, solder pads on the conductively filled through-holes are provided as required. Finally, at least one insulating layer is provided over part of the first side for die attachment.