摘要:
A moisture getter, which is a material capable of absorbing moisture, is painted within the cap of an integrated circuit package prior to sealing. The package is then heated to the high sealing temperature necessary to provide sealing without affecting the getter material. The getter material is formed from a family of materials which is capable of withstanding the high temperature of the sealing process without degradation and which can absorb a large amount of water after exposure to sealing temperatures.
摘要:
Technique for terminating signal leads on a substrate for a semiconductor chip to discrete resistors to eliminate impedance discontinuities involves a substrate having signal leads connected to resistive material which is in turn connected to a ground bus. Laser trimming equipment is used to selectively disconnect signal leads from the resistor zone, or to create separate resistor paths for each signal lead to bus, while trimming the resistor to the required transmission line terminating value. The signal leads are connected to the semiconductor chip by elevated leads which pass over the resistive material and the ground bus.
摘要:
A socket for connecting an integrated circuit package to a printed circuit board or the like wherein the connection between the circuit board and the semiconductor chip is as short as possible. This is accomplished by providing a straight line conductor between the integrated circuit package and the printed circuit board. In accordance with one embodiment, a contact in the form of a movable double ended sharp needle is employed to connect the lead from the package to the lead on a substrate. In order to provide the force mating the leads and the intermediate needle, external force is provided by a spring structure comprising a multi-fingered element with the tips of the fingers encapsulated in plastic or other compliant membrane separating the spring member and the leads of the package.
摘要:
An assembly line method for fabricating hermetically sealed integrated circuit chips with externally extending terminal leads comprising the steps of securing at least one integrated circuit chip upon a spider assembly; stamping a strip of iterative lead frame assemblies from a strip of flat stock metal; encapsulating each of said lead frame assemblies with plastic in a configuration which leaves a window space in the center thereof or defined elsewhere therein, with the convergent ends of the individual conductive paths of the lead frame extending out of the plastic and into said window space, and the divergent ends of such conductive paths extending out of the plastic and away from the window space; mounting the terminal chip holding spider assembly onto the convergent ends of the conductive paths of the lead frame; inserting a first cap over the window space on one side of the encapsulating plastic; filling the window space with a sealant to completely immerse said spider bearing chip therein and having the properties of being electrically insulative and virtually completely resistant to the passage of moisture therethrough; and inserting a second cap over said window space on the other side of said encapsulating plastic to completely seal said spider bearing chip therebetween in said sealant.
摘要:
Disclosed is an electrical connector having an insulative housing and conductive connector wherein conductive connector has a distal end which is angled and generally rectangular in shape with the four corners of the rectangular shape of the distal end bent to receive a fusible material. The fusible material will generally be a solder ball. Also disclosed is a product made by the process of bending the rectangular shape of the distal end of the contact so as to receive a solder ball.
摘要:
The present invention provides a multi fiber optical ferrule, a tool for forming the ferrule, and a method of making the ferrule. The multi fiber optical ferrule is formed of two ferrule halves which are either molded or cast as imprecise blanks which are machined using a broach in order to precisely cut inner surfaces thereof for receiving an array of fibers. The inner surfaces of a pair of ferrule halves are cut simultaneously in order to assure accuracy in the fiber receiving and pin receiving channels. The halves are joined together with a fiber array placed therebetween to form the ferrule.
摘要:
A perimeter independent precision locating member (22) for a semiconductor chip (10) so that contact sites upon the chip will be reliably positioned relative to connection members (18), such as contacts or leads, so that the chip may be electrically engageable. The locating member (22) is disposed upon the surface of the semiconductor chip (10) at a specific position relative the contact sites within the perimeter (24) of the chip and being closely matable with a complementary portion of a housing that contains the connection members (18). The method of making the perimeter independent precision locating member (22) for a semiconductor chip (10) involves coating the chip with a layer of photocurable material, masking the material in relation to the contact sites so that the portion of the material that will become the locating member (22) is exposed, illuminating the exposed portion of the photocurable material, and stripping from the chip the uncured portion to define the locating member (22).
摘要:
The present invention is a socket for removably connecting electrical conductors directly to the bond pads of an integrated circuit chip, and includes a chip holder that locks into the socket for burn-in and other testing and then can be removed and easily handled by automated equipment in the further processing of the chip. The socket has a series of contacts that are guided into electrical engagement with the bond pads through precisely positioned openings in a ceramic plate. The ceramic plate and the chip holder are aligned by a pair of guide pins that project from a housing. A pair of latching members secure the chip holder to the housing during burn-in and testing.
摘要:
An electrical connector has first terminals which are surface mounted to respective sides of a substrate and second terminals which extend through an edge surface of the substrate to make electrical connection to an opening provided in the substrate. As the connector is mated to the edge of the substrate, the connector occupies a minimal space on the substrate.
摘要:
An electrical connector has first terminals which are surface mounted to respective sides of a substrate and second terminals which extend through an edge surface of the substrate to make electrical connection to an opening provided in the substrate. As the connector is mated to the edge of the substrate, the connector occupies a minimal space on the substrate.