摘要:
A method of assembling a semiconductor power module component (30) and a manufacturing system comprising such a semiconductor power module component and a pressing apparatus (20) for manufacturing a semiconductor power module component are described. The semiconductor power module component (30) comprises at least a first element (1) (e.g. a semiconductor chip), a second element (2) (e.g. a substrate, such a DCB substrate) and a third element (3) (e.g. a base plate) arranged in a stack (10). The first element (1) and the second element (2) are joined by sintering in a sintering area (4) and the second element (2) and the third element (3) are joined by soldering in a soldering area (6). The sintering and the soldering are simultaneously executed, wherein the soldering area (6) is heated to a temperature of soldering and the sintering area (4) is heated to a temperature of sintering, the temperature of soldering and the temperature of sintering being harmonized to each other. Pressure is being applied to the stack (10), comprising the at least one soldering area (6) and the at least one sintering area (4) with stabilizing means (7) such as bumps on a surface of the second element (2) or third element (3), solid spacer means incorporated in a solder perform (8) or a wire mesh incorporated in a solder preform (8) being arranged in the soldering area (6). Additional component parts (14, 15) may be sintered onto the first element and/or the second element simultaneously with the sintering and the soldering of the stack (10). The pressure may be applied by a soft cushion-like element (23) surrounding component parts (1, 2, 3, 14, 15) of the module (30).
摘要:
A method for manufacturing semiconductor chips (2, 3) having arranged thereon metallic shaped bodies (6), having the following steps: arranging a plurality of metallic shaped bodies (6) on a processed semiconductor wafer while forming a layer arranged between the semiconductor wafer and the metallic shaped bodies (6), exhibiting a first connection material (4) and a second connection material (5), and processing the first connection material (4) for connecting the metallic shaped bodies (6) to the semiconductor wafer without processing the second connecting material (5), wherein the semiconductor chips (2, 3) are separated either prior to arranging the metallic shaped bodies (6) on the semiconductor wafer or after processing the first connection material (4).
摘要:
A power semiconductor contact structure for power semiconductor modules, which has at least one substrate (1) and a metal moulded body (2) as an electrode, which are sintered one on top of the other by means of a substantially uninterrupted sintering layer (3a) with regions of varying thickness. The metal moulded body (2) takes the form here of a flexible contacting film (5) of such a thickness that this contacting film is sintered with its side (4) facing the sintering layer (3a) onto the regions of varying thickness of the sintering layer substantially over the full surface area. A description is also given of a method for forming a power semiconductor contact structure in a power semiconductor module that has a substrate and a metal moulded body. The forming of the power semiconductor contact structure is performed firstly by applying a layer of sintering material of locally varying thickness to either the metal moulded body (2) or the substrate, followed by sintering together the contacting film (5) with the substrate (1) by using the properties of the layer of sintering material that are conductive to connection, the contacting film (5) being made to develop its distinct form to correspond to the varying thickness of the layer of sintering material (3a).
摘要:
A flow distributor (1) for distributing a flow of fluid through a cooling body, the flow distributor (1) comprising : - an inlet manifold (10), - an outlet manifold (15), - one or more flow cells, each being arranged to fluidly interconnect the inlet manifold (10) and the outlet manifold (15), each flow cell comprising a cell inlet (13) in fluid communication with the inlet manifold (10), a cell outlet (14) in fluid communication with the outlet manifold (15), and a flow channel for guiding a flow of fluid from the cell inlet (13) to the cell outlet (14), wherein the flow distributor (1) is formed within a solid layer (2) which is bonded directly to an insulating layer (3) to be cooled.
摘要:
Method for producing an electronic assembly (100) comprising a circuit carrier (10), at least one first electronic component (30) and at least one second component (40) comprises connecting the first component (30) to the circuit carrier (10) using a first sinter compound (20) by sintering under application of a pressure which acts locally on the first component (30), the first sinter compound (20) and the circuit carrier (10) in the region of the first component (30), whilst simultaneously connecting the second component (40) to the circuit carrier (10) by pressureless sintering using a second sinter compound (20). The at least one first component (30) may be an active component, such as a semiconductor, a power semiconductor, an IGBT transistor, a MOSFET transistor or a diode. The at least one second component (40) may be a passive component such as a surface mounted device (SMD) or may be selected from thermal sensors, current sensors, inductors, capacitors, resistors, wires, heavy wires and ribbons. The locally acting pressure in the region of the first component (30) may be applied uniaxially to the first component (30), the sinter compound (20) and the circuit carrier (10). The connection of the first electronic component (30) to the circuit carrier (10) via the first sinter compound (20) may be realized by the application of pressure to the first component (30) via an (upper) die (200) of a sintering device under the simultaneous effect of temperature. A connection of the second component (40) to the circuit carrier (10) by pressureless sintering using the second sinter compound (20) may likewise be simultaneously realized under the effect of temperature. The pressing die (200) may have a recess in the position in which the second component (40) is located, so that the pressing die (200) receives the second component (40) without exerting pressure thereon. Alternatively, the assembly (100) may be designed in such a way that the second component (40) is arranged altogether lower or has a smaller overall height than the first component (30), so that the die (200) cannot come into contact with the second component (40). The sinter compound (20) may be a dried sinter paste or a sinter pad. The sinter compound (20) may be affixed to the first or second component (30, 40) or to the circuit carrier (10) before the connection of the first or second component (30, 40) to the circuit carrier (10). A separating foil (210) may be arranged between the assembly (100) to be sintered and the pressing die (200), wherein, to prevent the pressing die (200) from being able to exert pressure on the second component (40) via the separating foil (210), the separating foil (210) may be provided with a recess in the region of the second component (40), which leaves the second component (40) uncovered. Thanks to the pressure sintering, the first electronic component (30) may be reliably installed despite the high variable loads and thanks to the pressureless sintering, the second component (40) may be installed without breaking.
摘要:
A method of forming a cohesive connection between a semiconductor (20) comprising an aluminium coated contact surface (30) and a shaped metal body (50) comprises the following steps: placing a preform on the contact surface of the semiconductor (20), wherein the preform comprises a dried sinter paste (40) enclosing a metallic structure (60) designed as a metallic grid or wavy metallic structure, placing the shaped metal body (50) on the preform, and processing the assembled components to form the cohesive connection, wherein the processing comprises the step of at least partially removing an oxide layer on the surface of the shaped metal body (50) and/or the contact surface of the semiconductor (20) by moving the metallic structure (60) in contact with the shaped metal body (50) and/or the semiconductor (20) relative to these. The movement of the metallic structure (60) may be at an ultrasonic frequency. The processing may comprise the movement of the shaped metal body (50) relative to the semiconductor (20). The shaped metal body (50) may comprise aluminium or an aluminium alloy, or alternatively copper or a copper alloy. The processing may comprise the application of pressure and/ or temperature. The melting point of the metallic structure (60) may be higher than the melting point of the sinter paste (40). The preform is preferably low temperature melting, with the melting point of the preform being
摘要:
A semiconductor module having a semiconductor and a housing enclosing the semiconductor, characterized in that the housing is made of an electrically conductive material and has a recess occupied by the semiconductor, wherein the side of the semiconductor opposite the recess is coplanar with the surface of the housing having the recess.
摘要:
An assembly for producing an electronic assembly by sintering, comprising a lower sintering tool (30) having a recess (32) for receiving an electronic assembly (20) to be produced by sintering, an upper sintering tool (40) for exerting a pressure directed against the lower sintering tool, and a protective film (50) arranged between the lower sintering tool and the upper sintering tool covering at least the recess of the lower sintering tool, characterized in that the protective film is perforated (52) to allow the feeding of a protective gas to the surface of the electronic assembly (20).
摘要:
The present invention discloses a sintering paste for bonding joining partners, the sintering paste contains means for mechanically breaking up an oxide layer formed on a surface of at least one of the joining partners, under the influence of a relative movement between the joining partners. In addition, the present invention also discloses a method for bonding joining partners by means of the sintering paste and a device for carrying out the method.
摘要:
A description is given of a power semiconductor module (10) which can be transferred from a normal operating mode to an explosion-free robust short-circuit failure mode. Said power semiconductor module (10) comprises a power semiconductor (1) having metallizations (3) which form potential areas and are separated by insulations and passivations on the top side (2) of said power semiconductor. Furthermore, an electrically conductive connecting layer is provided, on which at least one metal shaped body (4) which has a low lateral electrical resistance and is significantly thicker than the connecting layer is arranged, said at least one metal shaped body being applied by sintering of the connecting layer such that said metal shaped body is cohesively connected to the respective potential area. The metal shaped body (4) is embodied and designed with means for laterally homogenizing a current flowing through it in such a way that a lateral current flow component (5) is maintained until this module switches off in order to avoid an explosion, wherein the metal shaped body (4) has connections (6) having high-current capability. A transition from the operating mode to the robust failure mode then takes place in an explosion-free manner by virtue of the fact that the connections (6) are contact-connected and dimensioned in such a way that in the case of overload currents of greater than a multiple of the rated current of the power semiconductor (1), the operating mode changes to the short-circuit failure mode with connections (6) remaining on the metal shaped body (4) in an explosion-free manner without the formation of arcs.