摘要:
A boat for cleaning semiconductor packages, including cleaning ball grid array packages in centrifugal cleaners. The boat includes a bottom plate with receptacles for receiving semiconductor packages and a top plate having through holes, where each through hole is smaller than the receptacle with which it corresponds in the bottom plate. An alignment mechanism ensures that the top plate is aligned with the bottom plate in a manner that results in each through hole being positioned directly over a respective one of the receptacles. An attachment mechanism releasably attaches the top plate to the bottom plate in a co-planar relationship that results in the presence of a vertical space between the two plates.
摘要:
A method of maintaining z-height of an integrated circuit component, such as a multi-chip module, a chip or a die, and of visualizing alignment of an integrated circuit package during positioning of an integrated circuit component, is disclosed. The method maintains the z-height of an integrated circuit component during a solder reflow step by applying high-melting solder balls to interconnect pads on the package substrate surface. Such high-melting solder balls, for instance 90 Pb/10 Sn, do not collapse at temperatures sufficient to accomplish reflowing. The high-melting solder balls also make convenient visualization marks for alignment of the package substrate on an integrated circuit component placement tool, such as a die placement tool. A package substrate bearing high-melting solder balls in a pre-determined pattern is easily aligned by an integrated circuit placement tool using machine vision. Use of high-melting solder balls as visualization marks obviates the need for screen-printing of fiducial marks on the package substrate surface.
摘要:
A boat for cleaning semiconductor packages, including cleaning ball grid array packages in centrifugal cleaners. The boat includes a bottom plate with receptacles for receiving semiconductor packages and a top plate having through holes, where each through hole is smaller than the receptacle with which it corresponds in the bottom plate. An alignment mechanism ensures that the top plate is aligned with the bottom plate in a manner that results in each through hole being positioned directly over a respective one of the receptacles. An attachment mechanism releasably attaches the top plate to the bottom plate in a co-planar relationship that results in the presence of a vertical space between the two plates.
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 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:
A softened and compliant fillet portion of a cured polymeric underfill in a flip-chip arrangement reduces occurences of fillet crackings caused by thermal stresses. The softening of the fillet is achieved by chemically breaking cross-links in the cured polymeric underfill material using a chemical solvent. In another embodiment, the softening of the fillet is achieved by applying heat using a controllable beam of thermal energy to break up the cross-links to thereby soften the fillet.
摘要:
The present invention relates generally to a new method of repairing electrical lines, and more particularly to repairing electrical lines having an opening at the module level with devices in place. Various methods and processes are used to repair this open or defective portion in an electrical conductor line. It could be repaired by securing a jumper wire or nugget across the open or the repair could be made by a deposition process, which includes but is not limited to filling the opening with a solder type material or inserting a solder coated electrical wire and heating the solder and allowing the solder to melt and repair the open. One of the attributes of this invention is the ability to repair on a substrate or module on which active components such as chips, and passive components such as pins, capacitors, etc. have been attached. The invention also allows repair of fine line patterns which are normally not repairable by conventional techniques.
摘要:
The formation of sintered glass-ceramic substrates containing multi-level, interconnected thick-film circuit patterns of copper-based conductors obtained by firing in a controlled ambient of hydrogen and H.sub.2 O at temperatures below the melting point of copper.
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:
Thermal interface materials and method of using the same in packaging are provided. In one aspect, a thermal interface material is provided that includes an indium preform that has a first surface and a second surface opposite to the first surface, an interior portion and a peripheral boundary. The indium preform has a channel extending from the peripheral boundary towards the interior portion. The channel enables flux to liberate during thermal cycling.