Abstract:
Windage losses in the air gap (22) of a dynamoelectric machine and normally associated with direct contact liquid cooling are avoided through the provision of a first weir (42, 44) radially inwardly of rotor conductors (40) and a second weir (72, 76, 78) radially and axially outwardly of the first weir (42, 44) which provides a fan-like spray of coolant on stator end turns (34) at a location remote from the air gap (22).
Abstract:
A method of manufacturing hermetically sealed circuit assemblies (10) having circuit elements (74, 76, 78 and 80) to be compression bonded, a hermetically sealed circuit assembly having circuit elements to be compression bonded and a stack containing at least one hermetically sealed circuit assembly having circuit elements which are compression bonded is disclosed. Uniform thickness of individual hermetically sealed circuit assemblies measured across columns (22-30) is insured by positioning deformable spacers (124-132) in the columns containing the circuit elements to be compression bonded, and deforming the deformable spacers. Thereafter a compressive force is applied to a stack of one or more circuits through the columns which contain the circuit elements to be compression bonded. The individual hermetically sealed circuit assemblies have circular corrugations (32-40) in a flat surface (14) and circular corrugations (114-122) in a lid (20) which are disposed within the columns containing the individual circuit elements to be compression bonded.
Abstract:
A method of manufacturing hermetically sealed circuit assemblies (10) having circuit elements (76) to be compression bonded is disclosed. Uniform thickness of individual hermetically sealed circuit assemblies is insured by positioning deformable spacer (124, 128) in the columns containing the circuit elements to be compression bonded, and deforming the deformable spacers so that a surface of each of the deformed spacers lies within a single plane. Thereafter a compressive force is applied to a stack of one or more circuits through the columns which contain the circuit elements to be compression bonded.
Abstract:
A method of manufacturing hermetically sealed circuit assemblies (10) having circuit elements (74, 76, 78 and 80) to be compression bonded, a hermetically sealed circuit assembly having circuit elements to be compresssion bonded and a stack containing at least one hermetically sealed circuit assembly having circuit elements which are compression bonded is disclosed. Uniform thickness of individual hermetically sealed circuit assemblies measured across columns (22-30) is insured by positioning deformable spacers (124-132) in the columns containing the circuit elements to be compression bonded, and deforming the deformable spacers. Thereafter a compressive force is applied to a stack of one or more circuits through the columns which contain the circuit elements to be compression bonded. The individual hermetically sealed circuit assemblies have circular corrugations (32-40) in a flat surface (14) and circular corrugations (114-122) in a lid (20) which are disposed within the columns containing the individual circuit elements to be compression bonded.
Abstract:
Electrical isolation of semiconductors in a stack with interposed heat sinks is attained through the use of a thin sheet (30) of electrical insulating material disposed between first and second, electrically conductive heat sink elements (26), (28), each having a planar surface (32), (34) and an opposite surface (12), (14) configured to make good electrical and thermal contact with a semiconductor (16), (18), (20). Each heat sink element (26), (28) has a pair of ports (42), (44), (46) that may act as inlets or outlets and an internal conduit (54) interconnecting the same. The conduit (54) is in heat transfer relation to the sides (12) and (14) and the elements (26), (28) sandwich the sheets (30) between the planar sides (32) and (34). Adhesive (88), (90) bonds the planar surfaces (32) and (34) to the sheet (30).
Abstract:
A hermetically sealed semiconductor package (10, 100, 200) in accordance with the invention includes at least one integrated circuit (14, 15 or 16) with each integrated circuit having first (20) and second (22) opposed faces with the first face having at least one electrode (17-19) providing at least one first circuit connection to the integrated circuit with the second face providing a second circuit connection to the integrated circuit; a thermally conductive base (32) thermally coupled to the second face for conducting heat generated by operation of the at least one integrated circuit; an insulator (30) electrically isolating the first circuit connection from the second circuit connection; a sidewall (34) extending upward from the base.
Abstract:
A method of manufacturing hermetically sealed circuit assemblies (10) having circuit elements (74, 76, 78 and 80) to be compression bonded, a hermetically sealed circuit assembly having circuit elements to be compression bonded and a stack containing at least one hermetically sealed circuit assembly having circuit elements which are compression bonded is disclosed. Uniform thickness of individual hermetically sealed circuit assemblies measured across columns (22-30) is insured by positioning deformable spacers (124-132) in the columns containing the circuit elements to be compression bonded, and deforming the deformable spacers. Therafter a compressive force is applied to a stack of one or more circuits through the columns which contain the circuit elements to be compression bonded. The individual hermetically sealed circuit assemblies have circular corrugations (32-40) in a flat surface (14) and circular corrugations (114-122) in a lid (20) which are disposed within the columns containing the individually circuit elements to be compression bonded.
Abstract:
A hermetically sealed semiconductor package (10, 100, 200) in accordance with the invention includes at least one integrated circuit (14, 15 or 16) with each integrated circuit having first (20) and second (22) opposed faces with the first face having at least one electrode (17-19) providing at least one first circuit connection to the integrated circuit with the second face providing a second circuit connection to the integrated circuit; a thermally conductive base (32) thermally coupled to the second face for conducting heat generated by operation of the at least one integrated circuit; an insulator (30) electrically isolating the first circuit connection from the second circuit connection; a sidewall (34) extending upward from the base.
Abstract:
On obtient l'isolation électrique de semiconducteurs empilés avec des puits de dispersion de chaleur interposés en disposant une mince feuille (30) de matériau électriquement isolant entre un premier et un deuxième dispositifs (26, 28) de dispersion de chaleur életriquement conducteurs ayant chacun une surface plate (32), (34) et une surface opposée (12), (14) formée de façon à faire un bon contact électrique avec un semiconducteur (16), (18), (20). Chaque dispositif de disperssion de chaleur (26), (28) comprend une paire d'orifices (42), (44), (46) qui peuvent servir d'orifices d'admission ou d'évacuation et un conduit interne (54) qui les interconnecte. Le conduit (54) en relation de transfert de chaleur avec les côtés (12) et (14), et les dipositifs (26), (28) serrent les feuilles (30) entre les surfaces plates (32) et (34). Un adhésif (88), (90) relie les surfaces plates (32) et (34) à la feuille (30).
Abstract:
On évite les pertes par frottement d'air dans l'entrefer (22) d'une machine dynamo-électrique normalement associées au refroidissement par contact direct avec un liquide en formant un premier déversoir (42, 44) radialement à l'intérieur des conducterus (40) du rotor et un deuxième déversoir (72, 76, 78) radialement et axialement à l'extérieur du premier déversoir (42, 44), ce qui crée un jet de réfrigérant vaporisé en éventail sur les spires terminales (34) du stator à un endroit éloigné de l'entrefer (22).