摘要:
The obtention of enhanced planarity and dimensional integrity of sintered glass-ceramic substrates containing multi-level distribution of conductor patterns (e.g. copper) by a two stage firing of the green sheets, first between the anneal and softening points of crystallizable glass particles, interrupting the firing, superimposing selected light weights on the substrates, and heating through the coalescing temperatures to the crystallization of the glass.
摘要:
Various sockets for packaged integrated circuits and methods of making the same are provided. In one aspect, a method of mounting a semiconductor chip is provided that includes providing a package that has a base substrate with a first side and a second side opposite the first side. The second side has a central region. The package includes a semiconductor chip and a lid coupled to the first side. A socket is provided for receiving the base substrate. The socket includes a mound that projects toward the second side of the base substrate when the base substrate is seated in the socket to provide support for the central region of the base substrate. The package is mounted in the socket. The mound provides support for the central region of the base substrate.
摘要:
Various semiconductor chip arrangements and methods of making the same are disclosed. In one aspect, a method of manufacturing is provided that includes coupling a semiconductor chip that has an external peripheral wall to a first side of a substrate. A first metallic ring is coupled to the first side of the substrate. The first metallic ring has an internal peripheral wall that frames the semiconductor chip and is separated from the external peripheral wall by a gap. The first metallic ring has a coefficient of thermal expansion less than about 6.0 10−6 K−1.
摘要翻译:公开了各种半导体芯片布置及其制造方法。 一方面,提供一种制造方法,其包括将具有外周壁的半导体芯片与基板的第一侧耦合。 第一金属环耦合到衬底的第一侧。 第一金属环具有框架半导体芯片并且与外周壁隔开间隙的内周壁。 第一金属环的热膨胀系数小于约6.0×10 -6 K -1。
摘要:
Various method and apparatus for packaging an integrated circuit are provided. In one aspect, a method of packaging an integrated circuit is provided that includes coupling an integrated circuit to a substrate, mixing an adhesive with a plurality of particles, and coupling a lid to the substrate with the adhesive. At least a portion of the plurality of particles in the adhesive oppose compressive force from the lid to restrict rotation of the lid relative to the substrate.
摘要:
A method and apparatus are provided for controllably dispensing flux on a substrate having a plurality of conductive terminals. Flux having a viscosity range between 10 centipoises and about 150 centipoises is sprayed on the substrate and the conductive terminals at a valve pressure range between about 1.5 psi and about 30 psi via a dispense nozzle of a flux dispenser. Upon a subsequent high temperature solder reflow process, the sprayed flux on the substrate is mostly removed by thermal decomposition to volatile species, thereby significantly reducing flux residue remaining on the surface of the substrate between the conductive terminals.
摘要:
A method of fabricating laminate assemblies determines the ideal weight (W) of underfill to be dispensed, based on the size of the semiconductor die and the gap between the die and the laminate substrate. Underfill is dispensed in a single step in an amount between 1.1W and 1.3W to form fillets that cover at least 15% of the height of the semiconductor die on all four sides of the die. The amount of underfill ensures that the fillet coverage imbalance is 30% or less for each of the pairs of opposing sides of the die, thereby improving solder joint reliability.
摘要:
A method of manufacturing a semiconductor device by attaching a flip chip die to an organic substrate using solder comprises applying no-clean flux to the flip chip die or the organic substrate; heating the flip chip die and the organic substrate to bond the flip chip die to the organic substrate, and cooling the flip chip die and the organic substrate. The step of heating the flux includes controlling oxygen and moisture content of an atmosphere surrounding the flux, preheating to a temperature of about 145° C. to about 165° C., soaking at a temperature of about 145° C. to about 165° C. for about four to about six minutes, and reflowing above the solder's melting point.
摘要:
A boat is formed with a plurality of through-holes sized to securely maintain ceramic or organic flip chip semiconductor packages in place during assembly. Embodiments comprises a boat having a bottom layer with an array of four-sided through-holes and a top layer with an array of through-holes and tabs extending from the sides of the through-hole. Embodiments further include a boat having a bottom layer with through-holes smaller than substantially aligned overlying through-holes in the top layer, the substantially aligned through-holes forming flip chip package holding pockets. An alignment mechanism ensures that components are accurately positioned on flip chip packages held in the boat during assembly.
摘要:
Detection of flux residue remaining the formation of a device/substrate assembly is carried out by contacting the assembly with a fixed amount of solvent adapted to remove residual flux from the assembly and measuring the conductivity or resistance of the contacted solvent to determine the presence of flux residue in the solvent obtained from the assembly. Embodiments include contacting the assembly with isopropanol by immersing and withdrawing the assembly in a fixed amount of the solvent and measuring the conductivity of the contacted solvent with a volt meter.
摘要:
An organic carrier member for mounting a semiconductor device is provided that has a plurality of pin leads joined to conductive pads on the carrier member by a solder fillet having a reflow temperature higher than the temperature necessary to attach the semiconductor device. Embodiments include a bismaleimide-triazine epoxy laminate carrier member having an array of pins joined to the carrier member by a solder fillet having a reflow temperature of no greater than 275° C.