摘要:
The present invention relates to a method of bonding a first member (110, 210, 130, 230, 410, 430, 510, 530, 610) to a second silicon member (120, 220, 420a, 420b, 600) through anodic bonding. The method comprises the steps of selectively depositing on said first member bondable sections (170a, 170b, 270, 470a, 470b, 470c, 570, 620) before bringing said first and second members together for anodic bonding.
摘要:
A carrier intended for one or several electronic components and having spaces provided for the components on at least one surface is provided. The carrier has an at least partly conductive Low Temperature Cofire Ceramic (LTCC) material with good thermal conduction capacity, so that the carrier provides mechanical support for the components and conducts heat generated by the components.
摘要:
A compact printed board assembly has a patterned copper-coated substrate (1) with electronic components (5, 12) mounted thereon. Depending on the height of the components, either SBU lacquer (11) or non-flow prepreg (3) and laminate (4) surround the electronic components. This subassembly is then sandwiched between two RC (resin coated) copper foils (8) with the resin (7) facing the components (5, 12) and burying them, thereby providing a new etchable copper surface which can be connected by means of microvias (10) to the embedded components (5, 12).
摘要:
More even current distribution in a transmission line is provided by an arrangement including a first conductive layer, a dielectric layer and a ground plane. The first conductive layer, the dielectric layer and the ground plane extend mainly in substantially the same direction, with the dielectric layer arranged between the first conductive layer and the ground plane. The arrangement includes an object located between the dielectric layer and the ground plane. The object can be electrically conductive or made of a dielectric material.
摘要:
The present invention relates to a method for fabricating a cavity in substrate for a component for electromagnetic waves, the method comprising providing said cavity by removal of material from said substrate by removal of material by immersing the substrate in a liquid bath of a chemical etchant, so that resultant cavity has a top and a bottom side and sidewalls, and said cavity at one of said top and/or bottom sides exhibits an at least a four sided opening having an opening with at least two different adjacent angles. The invention also relates to the component for microwave applications.
摘要:
The present invention relates to a method for fabricating a cavity in substrate for a component for electromagnetic waves, the method comprising providing said cavity by removal of material from said substrate by removal of material by immersing the substrate in a liquid bath of a chemical etchant, so that resultant cavity has a top and a bottom side and sidewalls, and said cavity at one of said top and/or bottom sides exhibits an at least a four sided opening having an opening with at least two different adjacent angles. The invention also relates to the component for microwave applications.
摘要:
A component (16) mounted on the board (20) is cooled by a cooling surface (15) in contact with a heat sink element in the form of a metal stud (8) which, in turn, may be connected to an outer cooling surface. One method of achieving this is to form holes (4) in a laminate (1), etching patterns (5), placing a metal stud (8) in the hole (4), applying a dielectric (9) to the upper and lower side of the laminate (1), forming openings (14) in the dielectric (9), and thereafter metal plating the entire circuit board and etching further patterns. Component 16 can then be mounted on the printed circuit board (20). A heat sink element (8) includes a cutting edge (18) and can be used beneficially in conjunction with one embodiment of the method.
摘要:
Invention refers to an electric component, preferably a component buried in a Printed Circuit Board (PCB) including at least two conductive layers (13,21, 36; 15, 35) and an intermediate layer (14, 37). The intermediate layer (14, 37) further consists of at least two layers (16, 17, 22, 23, 38, 39, 40): at least a first layer (17, 23, 39) and a second layer (16, 22, 38, 40), which at least first layer has more elastic characteristic than the second layer (16, 22, 38, 40) at a certain temperature and/or pressure.
摘要:
The invention relates to a method and an apparatus for making an air gap (L, 1a) over at least one conductor (5, 5a) on a printed circuit board (1), minimizing the losses in the conductor (5, 5a). The well known Sequential Build Up (SBU) technology is used, wherein a carrier (3) with the conductor (5, 5a) is covered by a photosensitive varnish layer (7, 7a). An opening (8, 8a) is made in the varnish layer (7, 7a) above the conductor (5, 5a) by a photographic method. A metal layer (11, 11a) is then fastened to the varnish layer (7, 7a) covering at least said opening 88, 8a) so that an air gap (L, 1a) is formed between the conductor (5, 5a) and the metal layer (11, 11a). The resulting circuit board (1) has an air gap (L, 1a) well adapted to the conductor (5, 5a). According to an alternative inventive method the carrier (3) also comprises a lower conductor (5b) placed opposite to the conductor (5a) described above on the opposite side of the carrier. In the same way as above the lower carrier (5b) is provided with an air gap (1b). A layer (13) of dielectric material can be fixed to the metal layer (11) to obtain a more rigid construction.
摘要:
The present invention relates to a method of bonding a chip to an external electric circuit. The conductors of the external electric circuit for connection to the chip are formed with physical extensions and the chip is directly bonded to these extensions. The invention also relates to an electric device comprising at least one chip and an external electric circuit. The chip is directly bonded to physical extensions of conductors of the external electric circuit.