Abstract:
A circuit substrate includes a plurality of through holes (14, 44) into which a plurality of leads (18) as single electronic parts are inserted and soldered. Among these through holes (14, 44), the volume of the through holes (14b, 24b, 34b, 44b, 54b, 64b) into which the outermost end lead (18) of the electronic part is inserted is set greater than the volume of the through holes (14a, 44a) into which the lead located at the nearest position to the center of the electronic part is inserted.
Abstract:
A connector, and an associated method, for connecting an electrical circuit component (10) to a substrate, such as a printed circuit board. The connector (10) is formed of one of more pin members (14) formed of an electrically-conductive material which exhibits physical-memory characteristics. The pin member (14) is initially configured into a memory configuration and thereafter reconfigured into an alternate reconfiguration. The alternate configuration is selected to facilitate mounting of the circuit component (10) upon the substrate (28). Thereafter, the pin member (14) is heated to beyond a deformation threshold temperature. When at such temperature, the pin member (14) becomes reconfigured into the memory configuration. Through appropriate selection of the memory configuration, heating of the pin member (14) causes connection of the circuit component (10) with the substrate (28).
Abstract:
A method and apparatus suitable for forming hermetic electrical feedthroughs in a ceramic sheet having a thickness of ≤ 40 mils. More particularly, the method yields an apparatus including a hermetic electrical feedthrough which is both biocompatible and electrochemically stable and suitable for implantation in a patient's body. The method involves: (a) providing an unfired, ceramic sheet having a thickness of ≤ 40 mils and preferably comprising ≥ 99 % aluminium oxide; (b) forming multiple blind holes in said sheet; (c) inserting solid wires, preferably of platinum, in said holes; (d) firing the assembly of sheet and wires to a temperature sufficient to sinter the sheet material but insufficient to melt the wires; and (e) removing sufficient material from the sheet lower surface so that the lower ends of said wires are flush with the finished sheet lower surface.
Abstract:
The periphery of a land portion (14) which is formed on the surface of a printed wiring board so as to mount a part using lead-free solder is covered with an extension (21) of a solder mask (20) formed on the surface of the printed wiring board.
Abstract:
A method allowing for the inexpensive automated construction of interconnections between circuit boards is provided. According to the present invention, printed circuit pins (30) are inserted in a circuit board (10) from the top (component side). Provided the heads of the pins are thin enough to lie beneath a solder stencil, the pins may be pre-installed on the circuit board (10) and solder applied to the pins (30) at the same time solder is applied to other regions of the board. Thus, known surface mount techniques may be employed to form solder connections (72) between the pins (30) and conductive traces (12) on the circuit board, which facilitates the automation of the previously manual operation of soldering the printed circuit pins separately.
Abstract:
The invention relates to an assembly device (10), especially a fully automatic assembly device for producing microsystem technical products and for assembling components in the semiconductor industries. Said assembly device comprises an assembly table (12), at least one material transport system (32) that transports the products to be placed with components, and at least one transport system (16) that is mounted on the assembly table (12). The device is further provided with a component transport unit (28) with at least one assembly head (30). Said component transport unit(s) (28) is/are mounted on one or more carrier system(s) (20) that is/are displaced in parallel to the direction of transport of the products to be placed with components which products are in turn displaced by the material transport system(s) (32). The material transport system (32) consists of at least two individual transport systems (34, 36, 38, 40, 42, 44) that run parallel. Every individual transport system (34, 36, 38, 40, 42, 44) is provided with separately controlled drive systems (46, 48, 50, 52, 54, 56). The assembly device (10) has at least one information memory for receiving and processing component-specific data of a multitude of components in a component reservoir (58) and of data with respect to their position within the component reservoir (58). The component transport unit(s) (28) and/or the assembly table (12) are controlled on the basis of these data.
Abstract:
A method of constructing a planar array (10) of electrical contact pads (12) is disclosed, comprising the following steps. First, providing a set of dielectric layers (110, 112, 114, 116) each having two major surfaces and forming a set of first conductive paths (120) on a first major surfaces (110a, 112a, 114a, 116a). Second, forming a set of second conductive paths (122) on a second major surface (110b, 112b, 114b, 116b). Third, joining the set of dielectric layers (110a, 112a, 114a, 116a). Forth, forming an array (10) of first and second electrical contact pads (12) on the top surface. Fifth and finally, forming a set of plated vias (138) to connect each first electrical contact pad (12) to a first conductive path (12) and each second electrical contact pad (12) to a second conductive path (122).
Abstract:
In a process for manufacturing a surface-wave filter, a carrier plate 10 which can be subdivided into base plates 2 is provided with printed circuits in each base plate zone A and these are contacted with the active structures of surface-wave chips 1 by a flip-chip technique. A metal or plastic foil 3 or 4 is then laid on the carrier plate 10 fitted with chips and then processed under heat and pressure, for example, so that each chip 1 - except for the chip surface facing the carrier plate 10 - is enveloped and hermetically sealed on the carrier plate surface in the zones between the chips.
Abstract:
The present invention pertains to the field of electronics and more precisely relates to techniques for producing and controlling semi-conductor integrated micro-circuits as well as semi-conductor structures. The method for producing and controlling electronic components comprises placing a plurality of crystals in a press-mould using as an orientation reference the contact surfaces of the crystals and the base members of said mould. This method then comprises isolating all the crystal surfaces which are not protected except for the contact surfaces. This method is characterised in that the crystals placed in the press-mould are connected together so as to form a group support while all the crystals have their front surfaces located on a same plane with one of the surfaces of said group support. This method further comprises applying simultaneously on this plane all the conductors which are necessary to the electrical thermal ageing and control as well as the external connector of the support. In others variants of the present invention, this method comprises placing simultaneously the crystals and a group metallic frame in the press-mould, wherein said frame is simultaneously connected to the crystals. The group support can also be made in the shape of a flexible printed plate which is connected to a rigid base.
Abstract:
Temporary connections to spring contact elements extending from an electronic component such as a semiconductor device are made by urging the electronic component, consequently the ends of the spring contact elements, vertically against terminals of an interconnection substrate, or by horizontally urging terminals of an interconnection substrate against end portions of the spring contact elements. A variety of terminal configurations are disclosed.