Abstract:
The invention concerns a method for making electronic devices, for instance chip cards, comprising on a support (16) at least a chip (2) and a communication interface (10, 8) connected to the chip, the communication interface including at leas an ohmic contact pad (10) and an antenna (18). The invention is characterised in that it comprises, for each or the chip, steps which consist in: a) providing a chip in the form of a very thin semiconductor (2), the chip comprising at least a first bump contact (8) designed to be connected to a corresponding ohmic contact pad (10) and at least a second bump contact (14) designed to be connected to the antenna; b) providing a support (16) comprising an antenna having at least a connection point with a second corresponding bump contact of the chip; c) producing one face of the chip at least part of an ohmic contact pad connected to a first bump contact of the chip; d) transferring said chip onto the support with the or each contact pad facing outwards opposite said support; and e) fixing the or the second bump contact(s) of the chip at the corresponding connection point(s) of the antenna. The invention also concerns a chip card produced by said technology.
Abstract:
Interconnect assembly for printed circuit boards and method for forming them. In one example of the invention, an interconnect assembly comprises a substrate, a resilient contact element and a stop structure. The resilient contact element is disposed on the substrate and has at least a portion thereof which is capable of moving to a first position, which is defined by the stop structure, in which the resilient contact element is in mechanical and electrical contact with another contact element. In another example of the invention, a stop structure is disposed on a first substrate with a first contact element, and this stop structure defines a first position of a resilient contact element, disposed on a second substrate, in which the resilient contact element is in mechanical and electrical contact with the first contact element. Other aspects of the invention include methods of forming the stop structure and using the structure to perform testing of integrated circuits, including for example a semiconductor wafer of integrated circuits.
Abstract:
In a flip chip bonding method, polymer bumps (2) are formed, using a bonding tool, on an IC chip (1), held via suction to the bonding tool. An insulating adhesive film (5) is pressed onto the upper surface of a circuit board held via suction with a suction stage. Heat is then applied to bring the film into close contact with bond pads (4) of the circuit board (3). At this point, the bonding tool is moved downward, bonding the polymer bumps to the circuit board electrodes. During the time of this downward movement, bonding of the polymer bumps to the circuit board bond pads can be achieved by piercing the insulating adhesive film with the polymer bumps, and it is found that strong bonding can be achieved with adequate reliability. This method eliminates the need for a process in which through-holes must be pierced in the insulating adhesive film to accommodate the polymer bumps.
Abstract:
A method and apparatus for an electronic component package using wafer level processing is provided. Posts (1935) are formed on the active side of the substrate (1910) of an electronic component. A conductive layer (1945) leads the contact areas of the electronic component to the tops of the posts (1935). The conductive layer (1945) on the top of the posts (1935) acting as leads, attaching to traces on a printed circuit board.
Abstract:
A plurality of free-standing spring elements (512) are mounted to a surface (510a) of a carrier substrate (510). The carrier substrate (510) is mounted to a surface (502a) of a semiconductor device (502). Bond pads (504) of the semiconductor device are connected to the spring elements (512) by bond wires (520) extending between the bond pads (504) and terminals (516) associated with the spring elements. Alternatively, the carrier is flip-chip reflow soldered to the semiconductor device. The carrier substrate (510) is suitably mounted to one or more semiconductor devices (532, 534) prior to the semiconductor devices being singulated from a semiconductor wafer upon which they are formed. Resilience and compliance to effect pressure connections to the semiconductor device (502) are provided by the spring elements (512) extending from the carrier substrate (510), per se. Hence, the carrier substrate (510) suitably remains rigid with respect to the semiconductor device (502). The carrier substrate (510) is advantageously pre-fabricated, by mounting the spring elements (512) thereto prior to mounting the carrier substrate to the semiconductor device(s).
Abstract:
A bump bonding process and product are disclosed in which both pressure and heating are used in situations where the temperature should not exceed a predetermined amount, e.g., bonding of a photoconductor array to a module containing electronic processing devices. The bonding process involves eutectic alloying of indium and bismuth, thus allowing welding of the bumps at a temperature substantially below the two metals' melting points. In one version of the invention, bumps (24, 28) on adjacent substrates (20, 26) are directly aligned. In another version, each bump (74) on one substrate (70) is wedged between a pair of bumps (78a, 78b) on the other substrate (76).
Abstract:
A device comprising a semiconductor die and a redistribution portion coupled to the semiconductor die. The redistribution portion includes a passivation layer and a redistribution interconnect comprising a first surface and a second surface opposite to the first surface. The redistribution interconnect is formed over the passivation layer such that the first surface is over the passivation layer and the second surface is free of contact with any passivation layer. The device includes a bump interconnect coupled to the second surface of the redistribution interconnect. In some implementations, the bump interconnect comprises a surface that faces the redistribution interconnect, and wherein an entire surface of the bump interconnect that faces the redistribution interconnect is free of contact with the passivation layer.
Abstract:
A male connection component (120) for connection with a correspondingly confϊgured female connection component (140) having a recess (144) extending into a main surface (170) of a female Substrate (142) of the female connection component (140), wherein the female connection component (140) comprises a plurality of electrically conductive female contacts (146) which are electrically decoupled from one another and are arranged at different height levels with regard to the main surface (170) of the female Substrate (142), the male connection component (120) comprising a male Substrate (102), a Protrusion (104) protruding from a main surface (160) of the male Substrate (102) and comprising a plurality of electrically conductive male contacts (106) which are electrically decoupled from one another and are arranged at different height levels with regard to the main surface (160) of the male Substrate (102), wherein the male connection component (120) is adapted for connection with the female connection component (140) so that upon connection, each of the plurality of electrically conductive male contacts (106) is brought in contact with one of the plurality of electrically conductive female contacts (146) for providing electric contactation at different height levels, wherein the male Substrate (102) forms at least part of one of a chip, a chip package and a circuit board.