Abstract:
Provided are connection structures for a microelectronic device and methods for forming the structure. A substrate (10) is included having opposing surfaces and a plurality of holes (12A-D) extending through the surfaces. Also included is a plurality of electrically conductive posts (18A-D). Each post extends from a base to a tip located within a corresponding hole of the substrate. An additional substrate (20) may be provided such that the base of each post is located on a surface thereof. Additional electrically conductive posts (28A-D) may be provided having tips in corresponding holes (22A-D) of the additional substrate. Optionally, a dielectric material may be placed between the substrate and the posts.
Abstract:
Es wird ein vereinfachtes, kostengünstiges Verfahren zur Her- stellung von Leiterplatten und/oder entsprechenden Konstruk- ten vorgeschlagen, welche Stellen aufweisen, an denen Durch- kontaktierungen realisiert sind. Ein solches Verfahren ver- zichtet auf einen sehr aufwendigen Bürstvorgang und verwendet ausschliesslich kostengünstige Lackvarianten. Trotzdem wird zusätzlich erreicht, dass weitere Leiterbahnen oder entspre- chende Schichten nicht nur bis zu den Durchkontaktierungen sondern ohne weiteres sogar direkt darüber hinweg geführt werden können.
Abstract:
The present invention relates to a method for fabricating a printed circuit board which includes circuits of different thicknesses on the same surface. In the prior art, several PCBs were used for a power section and a signal section since there was no technology capable of fabricating a printed circuit board (PCB) which includes circuits of different thicknesses on the same layer. On the other hand, the present invention allows the power and signal sections to be integrally fabricated on one PCB such that electronic products can be smaller in size and lighter in weight and easily assembled. Also, according to the present invention, the power section and the signal section are integrated on one printed circuit board, such that a process is simplified and material consumption is reduced, and thus, production cost can be reduced and the time necessary for production can be shortened. Furthermore, according to the present invention, after the signal section is fabricated on the board, the power section is fabricated by a hot press forming process, so that the fabrication of the printed circuit board is achieved in a convenient and simple manner.
Abstract:
The object is to provide a printed circuit board which is also suitable for relatively high currents and is more resistant to environmental influences such as moisture and mechanical loads. The thickness of the conductor tracks (2) is made appreciably greater than 100 μm, and the intermediate spaces between the conductor tracks (2) are filled with a filling material (3) which has greatest possible adhesion to the conductor tracks (2), to the base plate (1) and to the solder resist mask (4) applied to the arrangement, being filled in such a way that the printed circuit board has a substantially planar surface without interruptions or depressions.
Abstract:
A circuit board comprising a composite resin (1) and a metal plate (3) having a circuit pattern. A copper or copper alloy plate exhibiting excellent thermal conductivity is preferably employed as the metal plate. The composite resin is made of 70-95 parts by weight of inorganic filler and 5-30 parts by weight of resin composition containing a thermosetting resin and a setting agent. At least one side, joined with the composite resin, of the metal plate is subjected to surface roughening and adhesion enhancement. In the circuit board, the composite resin enters the gap between the circuit patterns, and the composite resin composition and the metal plate form a plane on the side of the metal plate where a component is mounted. Since the resin composition containing the inorganic filler is also present between the circuit patterns formed of the metal plate, the heat dissipation characteristic of the circuit board is enhanced significantly, and a circuit board suitable for an electronic apparatus containing a heat generating component, e.g. a power circuit, is produced.
Abstract:
Passive electrical components such as capacitors, resistors, inductors, transformers, filters and resonators are integrated into electrical circuits utilizing a process which maximizes the utilization of the planar surfaces of the substrates for high density placement of active components such as logic or memory integrated circuits. The passive components are integrated into a conventional circuit board utilizing a photoimageable dielectric material (20). The dielectric (20) is photoimaged and etched to provide one or more recesses or openings (26) for the passive devices, and photovias interconnecting the inputs and outputs of the integrated circuit board. The electronic structure comprising at least one of the passive devices integrated into a photoimaged dielectric (20) is described as well as the method of manufacturing the same.
Abstract:
Low-impedance high-density deposited-on-laminate (DONL) structures having reduced stress features reducing metallization present on the laminate printed circuit board. In this manner, reduced is the force per unit area exerted on the dielectric material disposed adjacent to the laminate material that is typically present during thermal cycling of the structure.
Abstract:
A printed wiring board (1) such that openings (8L) formed around a pad (12L) which is a photo-via land do not overlap a pad (12L) and the area of each of the openings (8L) around the pad (12L) is equal to that of each of the other openings (8), the amount of resin (13) with which each of the openings (8, 8L) is filled is equal to that with which each of the openings (8L) is filled over the whole wiring board (1), and the amounts of resin (13) overflowing from the openings (8, 8L) are equal to each other. The circuit pattern provided on the upper surface of an interlayer insulating layer formed on the printed wiring board can be connected to a conductor pad area without causing any defective connection, providing a highly-reliable printed wiring board.
Abstract:
A multilayered printed wiring board having a smooth surface, which can be improved in resolution, interlayer insulating property, or thermal shock resistance without lowering its peel strength even if its insulating resin layer is thin. In the printed wiring board in which the conductor circuits of upper and lower layers are electrically insulated from each other by means of the insulating resin layer, the insulating layer is constituted of a composite layer composed of a lower layer made of a heat-resistant resin which is hardly soluble in an acid or oxidizing agent and an upper layer made of a bonding agent for electroless plating composed of a heat-resistant resin and, as necessary, a recessed section formed between conductor circuits of the lower layer is filled with a resin to the level corresponding to the surfaces of the conductor circuits.