Abstract:
A cooling arrangement (30a, 30b) for a power semiconductor module (10) comprises a thermally emitting surface (22) in thermal contact with at least one power semiconductor (16) of the power semiconductor module (10); a cooling body (24) in thermal contact with the thermally emitting surface (22) adapted for dissipating heat generated by the at least one power semiconductor (16); and a thermally conducting body (26a, 26b), which is arranged between the thermally emitting surface (22) and the cooling body (24), such that the heat emitted from the thermally emitting surface (22) is conducted via the thermally conducting body (26a, 26b) to the cooling body (24). The thermally conducting body (26a, 26b) comprises at least one foil (32, 32a, 32b) and a plastically deformable material (34) adapted for conduction heat, which is prevented to leak from the cooling arrangement (30a, 30b) by the at least one foil (32, 32a, 32b).
Abstract:
The present invention relates to a method for generating a power semiconductor module (14) using a heat applying joining technique for joining two joining partners (10, 16), the heat applying joining technique comprising the steps of: a) Providing a first joining partner (16) with a joining surface; b) Coating the joining surface of the first joining partner (16) at least partly with a protection coating (22), the protection coating (22) having a decomposition temperature t 1 at which the material of the protection coating (22) goes into the gaseous phase; c) Optionally applying a joining material (23) to at least a part of the protection coating (22) or to a joining surface of the second joining partner (16); and d) Joining the joining surfaces of the two joining partners (10, 16) by applying heat with a temperature t 2 , wherein t 2 ≥ t 1 and by optionally applying pressure to the joining partners (10, 16). One of the first and second joining partners (10, 16) is a substrate (10) and the further of the first and second joining partners (10, 16) is a power semiconductor device (16), a baseplate or a terminal. The heat applying joining technique may be a sintering process, a soldering process or an ultrasonic welding process. Such a method provides an especially gentle and cost-saving method for heat applying joining techniques, such as die-attachment.
Abstract:
Ein Halbleitermodul (10) umfasst eine Basisplatte (12), ein Substrat (14) auf der Basisplatte (12), das eine Metallisierung (28) auf wenigstens einer Seite aufweist und das wenigstens einen Halbleiterchip (24) trägt, ein Gehäuse (16), das an der Basisplatte (12) befestigt ist und das Substrat (14) wenigstens teilweise umschließt, und wenigstens einen Anschluss (34), der an einem anderen Ende einen Anschlussfuß (36) aufweist, der mittels Ultraschallschweißen auf einer Anschlussstelle (38) der Metallisierung (28) befestigt ist. Das Gehäuse (16) weist eine Schutzwandung (42) auf, die den Anschluss (34) umgibt und einen Innenraum (22) des Gehäuses (16) in einen ungeschützten Bereich (46) und einen geschützten Bereich (44) unterteilt. Die Schutzwandung (42) ist derart ausgebildet, dass zwischen dem Substrat (14) und der Schutzwandung (42) ein Spalt (48) gebildet ist, der dazu ausgeführt ist, einen Fluidstrom (60) derart zu führen, dass beim Ultraschallschweißen des Anschlussfußes (36) auf die Anschlussstelle (38) entstehende Partikel davon abgehalten werden, von dem ungeschützten Bereich (46) in den geschützten Bereich (44) zu dringen.
Abstract:
The present invention provides a method for electrically connecting a contact (7) of a first substrate (3) to a contact (11) of a second substrate (5), whereby the first substrate (3) is positioned below the second substrate (5), comprising the steps of providing the first substrate (3) with its contact (7) facing towards the second substrate (5), providing the second substrate (5) with its contact (11) facing away from the first substrate (3), bonding a bonding means (15) to the contact (7) of the first substrate (3), bonding the bonding means (15) to the first substrate (3) thereby forming a loop (17), and electrically connecting the contact (11) of the second substrate (5) to the bonding means (15). The present invention also provides an arrangement (1) of a first and a second substrate (3, 5), whereby the first substrate (3) is positioned below the second substrate (5), wherein a contact (7) of the first substrate (3) is connected to a contact (11) of the second substrate (5) according to the above method and a power semiconductor module comprising the above arrangement (1).
Abstract:
The invention is concerned with a high power semiconductor device comprising a substrate (10), a conductive layer (12) on a major surface of the substrate (10), a PD barrier (20) provided as a PD barrier layer along the edges of the conductive layer (12) where the conductive layer is joined to the substrate (10), wherein the PD barrier includes a ceramic material; and concerns a method for manufacturing such a high power semiconductor device.