摘要:
A semiconductor-device package (20) includes a printed circuit board (21) which has a chip-accommodating hole (25) in its centre and which has external connection terminals (24) formed on one side and a flexible substrate (26) which has a supporting film (27) having a central hole aligned with the chip-accommodating hole (25). A circuit pattern (28) is formed on the supporting film (27) and inner leads (28b) project inside the central hole (25) to form micro patterns. The flexible substrate (27) is bonded on the other side of the printed circuit board (21) and an electrical connection is formed between its circuit pattern (28) and that of the circuit board (21).
摘要:
L'invention concerne un microboitier plat, à multisorties périphériques, de type céramique-métal, pour les circuits intégrés ultra-rapides tels que ceux sur GaAs par exemple. Afin de faciliter l'insertion d'un circuit intégré uttra- rapide sur un substrat comportant un circuit électrique hyperfréquence, le microboitier selon l'invention comprend un cadre isolant (8) dont la face supérieure supporte des conducteurs du type ligne de transmission en microbandes (15) adaptées en impédance. Des microbandes épaisses (14), brasées sur les précédentes (15) constituent les connexions extérieures. Le cadre isolant (8) comprend en son centre une cavité (9) dans laquelle est logé le circuit intégré (10): les faces supérieures des microbandes (15) et du circuit intégré (10) sont dans le même plan. L'embase métallique (6) du boitier constitue le plan de masse. Application à l'encapsulation des circuits intégrés logiques ultra-rapides constituant les composants clés utilisés en télécommunication, en avionique, en informatique et en instrumentation.
摘要:
Provided is an inkjet adhesive which is applied using an inkjet device, wherein the adhesive can suppress generation of voids in the adhesive layer and, after bonding, can enhance adhesiveness, moisture-resistant adhesion reliability, and cooling/heating cycle reliability. An inkjet adhesive according to the present invention comprises a photocurable compound, a photo-radical initiator, a thermosetting compound having one or more cyclic ether groups or cyclic thioether groups, and a compound capable of reacting with the thermosetting compound, and the compound capable of reacting with the thermosetting compound contains aromatic amine.
摘要:
In order to provide a light emitting device having high connection reliability, the light-emitting device includes a board (10) provided with a wiring pattern (11), an anisotropic conductive paste (23) arranged on an board electrode (12) of the wiring pattern (11), and a light-emitting element (30) embedded in the anisotropic conductive paste (23), and at least one of the board electrode (12) and the element electrode (31) is plated with an AuSn alloy layer (34). The anisotropic conductive paste (23) contains an epoxy compound, an acid anhydride, white inorganic particles, and conductive particles (8) obtained by coating resin particles with an Au coating layer. It is possible to maintain electrical connection between the board electrode (12) and the element electrode (31) by the Au coating layers of the conductive particles even when a crack is generated in a eutectic bonding portion. Therefore, it is possible to obtain high connection reliability.
摘要:
An MCM includes a two-dimensional array of facing chips, including island chips (120-1, 120-2) and bridge chips (122) that communicate with each other using overlapping connectors. In order to maintain the relative vertical spacing of these connectors, compressible structures (124) are in cavities (114) in a substrate (110), which house the bridge chips, and provide a compressive force on the back surface of the bridge chips. These compressible structures include a compliant material with shape and volume compression. In this way, the MCM may ensure that facing surfaces of the island chips and the bridge chips, as well as connectors on these surfaces, are approximately coplanar without bending the bridge chips.
摘要:
A microelectronic assembly includes a semiconductor chip having chip contacts exposed at a first face and a substrate juxtaposed with a face of the chip. A conductive bond element can electrically connect a first chip contact with a first substrate contact of the substrate, and a second conductive bond element can electrically connect the first chip contact with a second substrate contact. The first bond element can have a first end metallurgically joined to the first chip contact and a second end metallurgically joined to the first substrate contact. A first end of the second bond element can be metallurgically joined to the first bond element. The second bond element may or may not touch the first chip contact or the substrate contact. A third bond element can be joined to ends of first and second bond elements which are joined to substrate contacts or to chip contacts. In one embodiment, a bond element can have a looped connection, having first and second ends joined at a first contact and a middle portion joined to a second contact.