摘要:
A method is disclosed for making a microelectronic package. A material is applied to a first major surface of a microelectronic element to reduce the heights of protrusions projecting from the first major surface. The microelectronic element is assembled to a microelectronic component. A method of forming protrusions and an assembly incorporating the microelectronic element having protrusions is also disclosed.
摘要:
A microelectronic assembly includes a first microelectronic element having a first face and contacts accessible at the first face, and a layer of a dielectric material having a bottom surface contacting the first microelectronic element, a top surface facing away from the first microelectronic element and holes extending between the top and bottom faces in alignment with the contacts on the first microelectronic element. The assembly includes conductive protrusions extending through the holes to the contacts, the conductive protrusions projecting beyond the top surface of the dielectric layer. The assembly also has a second microelectronic element having a first surface with conductive elements being accessible at the first surface thereof, the second microelectronic element being assembled with the first microelectronic element so that the contacts of the second microelectronic element are connected with the conductive protrusions and the top surface of the dielectric layer is spaced from the first surface of the second microelectronic element.
摘要:
A radio frequency chip package is formed by assembling a connecting element such as a circuit board or flexible circuit tape having chips thereon with a bottom plane element such as a lead frame incorporating a large thermally-conductive plate and leads projecting upwardly from the plane of the plate. The assembly step places the rear surfaces of the chips on the bottom side of the connecting element into proximity with the thermal conductor and joins the conductive traces on the connecting element with the leads. The resulting assembly is encapsulated, leaving terminals at the bottom ends of the leads exposed. The encapsulated assembly may be surface-mounted to a circuit board. The leads provide robust electrical connections between the connecting element and the circuit board.
摘要:
Inductors are provided in chip assemblies such as in packaged semiconductor chips. The inductors may be incorporated in a chip carrier which forms part of the package, and may include, for example, spiral or serpentine inductors formed from traces on the chip carrier. The chip carrier may include a flap bearing the inductive element, and this flap may be bent to tilt the inductive element out of the plane of the chip carrier to reduce electromagnetic interaction between the inductive element and surrounding electrical components. Other inductors include solenoids formed in part by leads on the chip carrier as, for example, by displacing leads out of the plane of the chip carrier to form loops in vertically-extensive planes transverse to the plane of the chip carrier. Additional features provide trimming of the inductor to a desired inductance value during by breaking or connecting leads during assembly.
摘要:
A packaged semiconductor chip includes features such as a chip carrier having a large thermal conductor which can be solder-bonded to a circuit panel so as to provide enhanced thermal conductivity to the circuit panel and electromagnetic shielding and a conductive enclosure which partially or completely surrounds the packaged chip to provide additional heat dissipation and shielding. The packaged unit may include both an active semiconductor chip and a passive element, desirably in the form of a chip, which includes resistors and capacitors. Inductors may be provided in whole or in part on the chip carrier.
摘要:
A method of making a microelectronic package includes providing a substrate having a plurality of conductive leads at a first surface of the substrate. The conductive leads may have first ends permanently attached to the substrate and second ends remote from the terminal ends, the second ends being movable relative to the first ends of the leads. One or more microelectronic elements having contact bearing surfaces and back surfaces remote therefrom may be juxtaposed with the substrate and the contacts connected with the first ends of the leads. A substantially rigid plate may be attached to the back surfaces of the microelectronic elements. The substantially rigid plate may be moved to a precise height above the substrate to vertically extend the leads. While the plate is maintained at the precise height above the substrate, a spacer material is dispensed between the plate and the substrate. The spacer material is then at least partially cured for holding the plate at the precise height above the substrate.
摘要:
A radio frequency chip package is formed by assembling a connecting element such as a circuit board or flexible circuit tape having chips thereon with a bottom plane element such as a lead frame incorporating a large thermally-conductive plate and leads projecting upwardly from the plane of the plate. The assembly step places the rear surfaces of the chips on the bottom side of the connecting element into proximity with the thermal conductor and joins the conductive traces on the connecting element with the leads. The resulting assembly is encapsulated, leaving terminals at the bottom ends of the leads exposed. The encapsulated assembly may be surface-mounted to a circuit board. The leads provide robust electrical connections between the connecting element and the circuit board.
摘要:
Inductors are provided in chip assemblies such as in packaged semiconductor chips. The inductors may be incorporated in a chip carrier which forms part of the package, and may include, for example, spiral or serpentine inductors formed from traces on the chip carrier. The chip carrier may include a flap bearing the inductive element, and this flap may be bent to tilt the inductive element out of the plane of the chip carrier to reduce electromagnetic interaction between the inductive element and surrounding electrical components. Other inductors include solenoids formed in part by leads on the chip carrier as, for example, by displacing leads out of the plane of the chip carrier to form loops in vertically-extensive planes transverse to the plane of the chip carrier. Additional features provide trimming of the inductor to a desired inductance value during by breaking or connecting leads during assembly.
摘要:
A microelectronic subassembly includes a substrate having a first surface, and one or more microelectronic elements positioned above the first surface of the substrate, each microelectronic element having a contact bearing face confronting the first surface of the substrate and a back surface remote therefrom. The subassembly includes a substantially rigid plate attached to the back surfaces of the microelectronic elements, an array of flexible leads extending between the substrate and the microelectronic elements, the leads having first ends attached to the substrate and second ends attached to the contacts of the microelectronic elements, and an at least partially cured spacer material sandwiched between the substantially rigid plate and the substrate for holding the contact bearing faces of the microelectronic elements at a precise height above the substrate.
摘要:
A method of manufacturing a plurality of microelectronic packages including electrically and/or thermally conductive elements. The method includes providing a support structure having a plurality of protrusions and depressions extending outwardly from the support. A conductive element is then mated to the support structure in a male-to-female relationship. The depressions formed in the support structure and conductive element are used to house a microelectronic element such as a semiconductor chip. A substrate is provided so as to cover substantially each depression located in the conductive element. Leads interconnect contacts to the chip to terminals on the substrate. A curable encapsulant material may be deposited into the depression so as to protect and support the leads and the microelectronic element. Additionally, the curable encapsulant material forms part of the exterior of a single resulting chip package once the assembly is diced and cut into individual packages.