Abstract:
The invention relates to a method of thinning a block transferred to a substrate. According to the invention, the method includes depositing a stop layer at least onto the substrate and in a way adjacent to and contiguous with the transferred block. The stop layer is made out of material of greater resistance or hardness than the material of the transferred block and of smaller thickness than that of the transferred block. The method further includes actuating the thinning of the transferred block. The thinning time is pre-programmed as a function of a predetermined speed of thinning the transferred block, the thinning time being selected so that the thinning also attacks the stop layer.
Abstract:
A method for soldering or hybridizing two components including preparing, on opposing surfaces of the components to be welded or hybridized, a wettability surface, depositing on one of the wettability surfaces an appropriate quantity of solder material, constituting a soldering or hybridizing dot, contacting the wettability surfaces of the components with the solder material deposited, then raising the temperature of the chamber in which the components are positioned, to at least the melting point of the solder material in order to ensure the effective soldering or hybridizing of the two components together by a remelt effect. At least one of the components is in contact with a conducting track having another quantity of solder material that constitutes a sacrificial dot, having a contact area with the at least one component that is higher than that of the solder quantity that constitutes the soldering or hybridizing dot.
Abstract:
A method of sealing or welding two elements to one another in a chamber under vacuum or controlled atmosphere. The method comprises steps consisting of: producing a wettability area on opposing faces of the elements to be welded, with one of the areas comprising a layer of gold and having a surface area greater than the surface area of the other wettability area; depositing a quantity of suitable sealing material comprising indium on one of the areas; bringing the wettability area of the other element into contact with the material thus deposited; and raising the temperature of the chamber containing the elements to be welded or sealed to at least 250° C. in a non-oxidizing atmosphere, in order to seal the two elements effectively to one another by means of remelting.
Abstract:
The invention relates to a method of thinning a block transferred to a substrate. According to the invention, the method includes depositing a stop layer at least onto the substrate and in a way adjacent to and contiguous with the transferred block. The stop layer is made out of material of greater resistance or hardness than the material of the transferred block and of smaller thickness than that of the transferred block. The method further includes actuating the thinning of the transferred block. The thinning time is pre-programmed as a function of a predetermined speed of thinning the transferred block, the thinning time being selected so that the thinning also attacks the stop layer.
Abstract:
This invention relates to a process for making an electrical connection between a first component (10) comprising a set of first pads (8) and a set of hard conducting tips (13) on one face, and a second component (11) comprising a set of second pads (9) and a set of ductile conducting bumps (14) on the other face, in which the two faces are made to face each other and they are brought towards each other such that the tips (13) can penetrate into these bumps (14), in which the space between two tips (13) is less than the width of a bump (14) and less than the width of a first pad (8).The invention also relates to such a component on which such a set of conducting tips is installed.
Abstract:
The invention relates to an electronic device comprising: a circuit, comprising a first and a second face, the first face being provided with electrical connection means, a transfer element, comprising a first face and a second face, and being assembled to the second face of the active element through its first face, and comprising electrical connection means on its second face, a connection between the electrical connection means of the active element and the electrical connection means of the transfer element.
Abstract:
A method and device for hybridization of components by solder beads on a substrate using an oven, comprising: raising the temperature of a heating element of the oven, with no contact either with substrate or with component, bringing substrate into thermal contact with heating element for time .DELTA.t, and uncoupling substrate and heating element at the end of time .DELTA.t.
Abstract:
The invention relates to a process for coating electronic components mounted on a substrate using a bump or ball hybridization method. It also relates to the coated electronic component obtained by performing this process. The process comprises placing bumps on the substrate, around an electronic component in order to form a bump belt or carpet contiguous with said electronic component and depositing at least one drop of a coating substance on said bump belt, the bumps of the belt impregnated with the substance being able to make said substance migrate by capillarity towards the bumps located between said electronic component and said substrate. The invention has applications in microelectrics, data processing and optoelectronics.