Abstract:
An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising: (a) a main portion which comprises a main part of the first electrode, a main part of the second electrode, and a main part of the resistive element; and (b) a first connection leg which extends away from the main portion and which comprises a first leg part of the first electrode which is integral with the main part of the first electrode, and a first leg part of the resistive element which is integral with the main part of the resistive element. Such devices can be secured to circuit boards in a variety of ways, and to elastically deformed terminals. Preferably preferred devices contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. The cross-conductor permits connection to both electrodes from the same side of the device, and also makes it possible to carry out the steps for preparing such devices on an assembly which corresponds to a number of individual devices, with division of the assembly as the final step.
Abstract:
An apparatus and method is disclosed that allows for the arranging in a three dimensional array semiconductor chips on a circuit board. A unique chip carrier is disclosed on which any IC chip can be positioned on above the other on a circuit board. Additionally, the carrier allows for the testing of IC chips on the carrier and underneath it without having to remove the carrier and chips from the system even if they are of the BGA or CSP type. The carrier includes exposed test points to allow an on site test.
Abstract:
The present invention provides an apparatus for connecting semiconductor modules, in particular memory banks, having: at least two devices (A, B) for receiving a respective semiconductor module (1, 2); a contact device (13a, 13b, 13c, 13d, 13e, 13f) having a first group of contacts (13a, 13b, 13c, 13d) and a second group of contacts (13e, 13f), the two groups being able to be connected to one another by means of a variable connection module (3, 4); a group of lines (10, 11, 20, 21) for connecting the receiving devices (A, B) to the first group of contacts (13a, 13b, 13c, 13d), a subgroup (13b, 13c) of the first group of contacts being assigned to the lines (10, 11) of the first receiving device (A); the connection module (3, 4) connecting either a subgroup of the contacts (13b, 13c) to the second group of contacts (13e, 13f), or the first group of contacts (13a, 13b, 13c, 13d) to the second group of contacts (13e, 13f). The present invention likewise provides a method for connecting semiconductor modules, in particular memory banks.
Abstract:
A microprocessor assembly is located on a daughterboard, which is configured to be physically and electrically coupled to a motherboard. One of the electrical terminals in an electrical connector between the daughterboard/motherboard is coupled to either a ground or a voltage supply Vdd on the daughterboard, depending on the type of microprocessor used. The electrical connector passes either the ground or Vdd signal to a semiconductor device on the motherboard to automatically identify the type of microprocessor on the daughterboard.
Abstract:
A connection technique for switchably and mutually exclusively coupling a plurality of device sets. The connection technique utilizes a low profile connector having multiple circuit sets, each of which is configured for mutually exclusive and removable insertion into a receptacle coupled to multiple devices. Each one of the multiple circuit sets, which is inserted into the receptacle, couples a desired set of the plurality of device sets.
Abstract:
A circuit board connector for connecting a disc drive circuit board to a device outside the disc drive includes a circuit board tab forming part of the circuit board and extending from the circuit board tab. Contact pads are formed on the circuit board tab. A housing attached to the circuit board includes a housing tab extending from the housing, the housing tab being substantially parallel and adjacent to the circuit board tab, such that the circuit board tab and the housing tab together form a connecting tab.
Abstract:
A multi-connectable printed circuit assembly, comprising: (a) a printed circuit substrate 11 having a first edge 22 and first and second edge regions 44/55, wherein at least the first edge region 44 is defined along the first edge 22; (b) a first array 77 of electrical connection features 66 disposed on or within the substrate proximate the first edge region 44; (c) a second array 88 of electrical connection features 66 disposed on or within the substrate proximate the second edge region 55, wherein the second array 88 is substantially a duplication or a mirror image of the first array 77; and (d) a plurality of circuit traces 99 disposed on or within the substrate such that each electrical connection feature 66 of the first array 77 is connected by one of the circuit traces 99 to a corresponding electrical connection feature 66 of the second array 88.
Abstract:
A multi-connectable printed circuit assembly, comprising: (a) a printed circuit substrate 11 having a first edge 22 and first and second edge regions 44/55, wherein at least the first edge region 44 is defined along the first edge 22; (b) a first array 77 of electrical connection features 66 disposed on or within the substrate proximate the first edge region 44; (c) a second array 88 of electrical connection features 66 disposed on or within the substrate proximate the second edge region 55, wherein the second array 88 is substantially a duplication or a mirror image of the first array 77; and (d) a plurality of circuit traces 99 disposed on or within the substrate such that each electrical connection feature 66 of the first array 77 is connected by one of the circuit traces 99 to a corresponding electrical connection feature 66 of the second array 88.
Abstract:
Disclosed are a printed circuit board and a method for wiring signal lines on the same. Connecting lines for electrically connecting chip select pins of a semiconductor chip, no connect pins and address designate pins, are formed on a PCB. In case of an unstack type, a pad is connected to chip select pin and no connect functioning pin of other semiconductor chip via a first signal line. In case of a stack type, another pad used with a pad is connected to a no connect functioning pin and a chip select pin of the corresponding semiconductor chip having no connection with the first signal line via a second signal line. According to the type of semiconductor chip, e.g. unstack or stack type, a second connecting pad selectively connecting by a first jumper having almost zero resistance value, is disposed between the first and the second signal lines. A first connecting pad is also disposed at the second signal line, the first pad is selectively connected by a second jumper having zero resistance value. Seven connecting pads are disposed on the PCB and an outer pad for transmitting an address signal is connected to three pads which are not disposed adjacently in series. Among the remained four connecting pads, three pads are connected to connecting lines connecting the respective pins of semiconductor chips by signal lines, and the rest is connected to a signal line by another signal line. According to the memory capacity of semiconductor chip, the spaces between the respective connecting pads are selectively connected by jumpers.
Abstract:
A case for an auxiliary circuit board to be mounted on a main circuit board includes a copper sheet formed into a U-shape in which the auxiliary circuit board is mounted. Mounting pins extend from two edges of the case for positioning the auxiliary circuit board perpendicularly to or parallel to the main circuit board. Mounting pins for through hole mounting and support tabs for surface mounting are provided, the unneeded features being removed prior to use of the case.