摘要:
Example methods and apparatuses reduce the likelihood of defects forming in bumps (114, 116, 118, 808, 810) associated with first level interconnects between semiconductor dies (106, 108, 802) and substrates (package substrates (110, 804) or other dies) associated with shifting in plated tin (1802, 2506) upon stripping and swelling of a dry film resist (1002, 1102, 2406), wicking of tin (1802, 2506) upon tin (solder) reflow following removal of the dry film resist (1002, 1102, 2406) (which both could lead to unintended bridging of bumps) and a lack of co-planarity across different bumps due to warpage and/or other factors, by fabricating dummy bumps (702, 812) adjacent operational bridge bumps (604, 810), fabricating bumps (1806+1808+1802) with bases (1806+1808) with non-circular shapes (e.g., polygonal shapes such as octagonal or hexagonal, wherein the shape may correspond to a packing geometry of the bumps), and/or fabricating bumps (2502+2504+2506) with diameters or widths and heights that differ spatially across the area (e.g., between ring-shaped regions (2712)) over which the bumps (2502+2504+2506) are distributed. Such potential defects are reduced in a manner that enables the bumps to be fabricated with a smaller size and/or smaller spacing to meet the ongoing needs of scaling down the overall size of electronic components. In an embodiment, the bumps (114) of the first level interconnects include two different types of bumps corresponding to core bumps (116, 808) (i.e., bumps on the dies (106, 108, 802) through which electrical signals pass between the dies (106, 108, 802) and the package substrate (110, 804) and then to components external to the IC package (100)) and bridge bumps (118, 810) (i.e., bumps on the dies (106, 108, 802) through which electrical signals pass between different ones of the dies (106, 108, 802) within the package (100), via an interconnect bridge (126) embedded in the package substrate (110)), wherein the core bumps (116, 808) are typically larger than the bridge bumps (118, 810). An array of dummy bridge bumps (702, 812) may be positioned adjacent the outer edge or perimeter of the operational bridge bumps (604, 810) so as to at least partially fill in open spaces (608) adjacent an outer edge or perimeter of the array of operational bridge bumps (604, 810) and thus limit bump shifting upon resist swelling in the remaining open space to the dummy bridge bumps (702, 812), thereby protecting the operational bridge bumps (604, 810), as well as to improve plating uniformity (e.g., the relative bump thickness variation (rBTV)) across the operational bridge bumps (604, 810). The operational bridge bumps (604, 810) and the dummy bridge bumps (702, 812) may have the same or different size and shape. The dummy bridge bumps (812) may have a shorter height so that they do not form a connection that extends a full distance between the die (802) and the package substrate (804).
摘要:
Bei einem Verfahren zur Verbindung von Komponenten bei der Herstellung leistungselektronischer Module oder Baugruppen werden zu verbindende Flächen der Komponenten (3, 4, 5, 9) mit einer metallischen Oberflächenschicht (1) bereitgestellt oder versehen, die eine für direktes Bonden ausreichend glatte Oberfläche aufweist oder geglättet wird, um eine für direktes Bonden ausreichend glatte Oberfläche zu erhalten. Die Oberflächenschichten (1) der zu verbindenden Flächen werden dann mit einem Druck von mindestens 5 MPa bei erhöhter Temperatur gegeneinander gepresst, so dass sie sich unter Bildung einer einzigen Schicht (2) miteinander verbinden. Das Verfahren ermöglicht eine einfache und schnelle Verbindung auch von größeren Kontaktflächen, die den hohen Anforderungen leistungselektronischer Module genügt. Die zu verbindenden Komponenten können wie folgt sein: ein oder mehrere Halbleiterbauelemente (4) und ein Substrat (3); zwei miteinander zu verbindende Halbleiterbauelemente (1) (z.B. zwei Dioden (4) oder zwei MOSFETs (4)); ein oder mehrere streifenförmig ausgebildete elektrische Verbindungselemente (5) und ein Halbleiterbauelement (4) und ein Substrat (3); ein Halbleiterbauelement (4) (MOSFET) und ein Kondensator (9); ein Kondensator (9) und ein Substrat (3). Beim Verbinden eines Halbleiterbauelements (4) mit einem Substrat (3) können die Oberflächenschichten (1) vor der Verbindung strukturiert oder bereits strukturiert bereitgestellt werden, so dass nach der Verbindung einzelne Schichtbereiche der gebildeten Schicht (2) durch Zwischenräume (7) elektrisch voneinander isoliert sind, und/oder können die Oberflächenschichten (1) vor der Verbindung zur Bildung von Vertiefungen strukturiert oder bereits strukturiert bereitgestellt werden, wobei vor der Verbindung ein Isolationsmaterial (6) in ein oder mehrere der Vertiefungen der Oberflächenschichten (1) eingebracht wird, das vorzugsweise bei der Herstellung der Verbindung durch die erhöhte Temperatur aufschmilzt, z.B. ein Glasmaterial. Beim Verbinden mehrerer Halbleiterbauelemente (4) mit einem Substrat (3) können die Halbleiterbauelemente (4) aus unterschiedlichen Materialien bestehen (ein ultradünnes Halbleiterbauelement (4) aus GaN und ein ultradünnes Halbleiterbauelement (4) aus SiC) oder gleich oder unterschiedlich angeordnet sein (ein erster MOSFET (4) mit der aktiven Fläche nach unten und ein zweiter MOSFET (4) mit der aktiven Fläche nach unten oder nach oben). Bei zwei auf einem Substrat (3) nebeneinander angeordneten, gleich gerichteten MOSFETs (4) kann ein weiteres Substrat (3) über die beiden MOSFETS (4) aufgebracht werden. Beim Stapeln mehrerer MOSFETs (4) werden sie versetzt zueinander gestapelt. Die zu verbindenden Flächen der Komponenten (3, 4, 5, 9) können mit einer Oberflächenschicht (1) aus Ag oder einem Ag als Hauptbestandteil enthaltenden metallischen Material als die metallische Oberflächenschicht (1) bereitgestellt oder versehen werden. Auch andere Materialien wie beispielsweise Cu, Au, Ti, Pt oder Al können für die Oberflächenschichten (1) genutzt werden.
摘要:
A heat-resistant release sheet of the present disclosure is a sheet formed of a single-layer heat-resistant resin film having a thickness of 35 µm or less, wherein the sheet is disposed between a compression bonding target and a thermocompression head at the time of thermocompression-bonding the compression bonding target by the thermocompression head to prevent fixation between the compression bonding target and the thermocompression head, and a heat-resistant resin forming the heat-resistant resin film has a melting point of 310°C or higher and/or a glass transition temperature of 210°C or higher. A use temperature of this heat-resistant release sheet can be, for example, 250°C or higher. The heat-resistant release sheet of the present disclosure can more reliably meet a demand for an increase in thermocompression bonding temperature.
摘要:
The heat-resistant release sheet of the present disclosure is a sheet including a sheet made of polytetrafluoroethylene (PTFE) or a modified PTFE, wherein the sheet is disposed between a compression bonding target and a thermocompression head at the time of thermocompression-bonding the compression bonding target by the thermocompression head to prevent fixation between the compression bonding target and the thermocompression head, and the content of a tetrafluoroethylene (TFE) unit in the modified PTFE is 99 mass% or more. The heat-resistant release sheet of the present disclosure can more reliably meet a demand for a shorter time (work time) required for thermocompression bonding.
摘要:
An anisotropic conductive film (ACF), a bonding structure, and a display panel, and their fabrication methods are provided. The ACF includes a resin gel and a plurality of conductive particles dispersed in the resin gel. The plurality of conductive particles is aligned and connected, in response to an electric field, to form a conduction path in the resin gel. The bonding structure includes the anisotropic conductive film (ACF) sandwiched between first and second substrates. The display panel includes the bonding structure.
摘要:
A wire feeding and bonding tool and method for attaching wires to a component having first and second spaced-apart wire attach structures. Wire from a supply is fed through a capillary having at least a linear end portion with a feed opening. The capillary is positioned with respect to the component to locate a first portion of the wire extending from the feed opening adjacent to the first wire attach structure, and the wire is attached to the first attach structure. The capillary is moved with respect to the component along a wire feed path to feed the wire from the first wire attach structure to the second wire attach structure and to locate a second portion of the wire extending from the feed opening adjacent to the second attach structure. The wire is attached to the second wire attach structure, and cut from the supply.
摘要:
A die bonding apparatus (10) comprises a first inert gas container (40) having a first inert gas concentration and a second inert gas container (50) having a second inert gas concentration enclosed within the first inert gas container (40). The second inert gas concentration is higher than the first inert gas concentration. The die bonding apparatus (10) further comprises a bond head (52) located in the second inert gas container (50) for receiving a die (24) for bonding and a third inert gas container (80) having an inert gas environment that is separate from the first and second inert gas containers (40, 50) and where a substrate (26) is locatable for die bonding. The bond head (52) is operative to move the die (24) between a first position within the second inert gas container (50) and a second position within the third inert gas container (80) to bond the die (24) onto the substrate (26) located in the third inert gas container (80). The third inert gas container (80) may comprise a portion of a bond stage (60) enclosed by the walls (62) on the sides, by a bond stage pedestal (66) on the bottom and by the first inert gas container (40) base plate (42) on the top. The bond stage (60) is movable for receiving the substrate (26) to be processed and below the first inert gas container (40). The bond stage walls (62) may comprise a plurality of inert gas outlets (64, 68, 69) for expelling inert gas towards the first inert gas container (40) to form an air curtain to restrict ambient air from entering the third inert gas container (80).
摘要:
A compression bonding device capable of packaging electric components on both sides of a substrate is provided. A compression bonding device 1 includes first and second pressing rubbers 15, 25. Electric components 32, 33 can be simultaneously packaged on the front face and the rear face of a substrate 31 by sandwiching the substrate 31 between the first and second pressing rubbers 15, 25. The electric components 32, 33 are not subjected to a force for horizontally moving them because the first and second pressing rubbers 15, 25 are prevented from horizontal extension by a first dam member 16. Thus, the electric components 32, 33 are connected to the substrate 31 without misalignment, thereby obtaining a highly reliable electric device 30a.