Abstract:
At edge termination region (12), a trench (22) is disposed near an interface of an active region (11). Inside the trench (22), an embedded insulating film (23) is embedded, and inside the embedded insulating film (23), a FP (45) long in a direction of depth is disposed. The FP (45) curves outwardly away from an inner side wall (22a) of the trench (22) as a depth from a base front surface increases. At least near a bottom end of the FP (45), a distance (w3) between the FP (45) and the inner side wall (22a) of trench (22) is greater than a width (w2) of the groove (24). The FP (45) is connected to a front surface electrode (4) that extends on the embedded insulating film (23). As a result, breakdown voltage can be enhanced, adverse effects of the surface charge can be reduced, and chip size can be further reduced.
Abstract:
In described examples, an LDMOS device (1200) includes at least one drift region (1222) disposed in a portion of a semiconductor substrate (1210); at least one isolation structure (1252) at a surface of the semiconductor substrate (1210); a D-well region positioned adjacent a portion of the at least one drift region (1222), and an intersection of the drift region (1222) and the D-well region forming a junction (1226) between first and second conductivity types; a gate structure (1282) disposed over the semiconductor substrate (1210); a source contact region (S) disposed on the surface of the D-well region; a drain contact region (D) disposed adjacent the isolation structure (1252); and a double buffer region including a first buried layer (1228) lying beneath the D-well region and the drift region (1222) and doped to the second conductivity type, and a second high voltage deep diffusion layer (1218) lying beneath the first buried layer (1228) and doped to the first conductivity type.
Abstract:
In described examples, an integrated semiconductor transistor chip (110a) for use in a buck converter includes a high side transistor (120a), which is formed on the chip (110a) and includes a laterally diffused metal oxide semiconductor (LDMOS) transistor. Also, the chip (110a) includes a low side transistor (130a), which is formed on the chip (110a) and includes a source down metal oxide semiconductor field effect transistor (MOSFET). Further, the chip (110a) includes: a substrate (138) for use as a source for the low side transistor (130a); and an n-doped well (122) for isolation of the high side transistor (120a) from the source of the low side transistor (130a).
Abstract:
An ESD protection circuit (100) and device structure (200) comprises five transistors (101, 102, 103, 104 and 105), two PNP and three NPN. The five transistors are coupled together so that a first NPN and PNP pair (101, 102) constitute a first silicon controlled rectifier, SCR. The NPN transistor 102 of the first SCR and a third transistor (103) of NPN type are coupled so that they constitute a Darlington pair. A further NPN and PNP pair (104, 105) are coupled together to form a second SCR with the collector of the PNP transistor of the first SCR being coupled with the emitter of the PNP transistor (104) of the second SCR. The circuit is particularly suitable for high voltage triggering applications and two or more devices may be cascaded in series in order to further increase the triggering voltage.
Abstract:
In described examples, an integrated circuit device (100) includes an internal circuitry (102) to be protected against a voltage. The voltage can be received through an I/O node (101). A FET (103) is connected between the I/O node (101) and the internal circuitry (102) to protect the internal circuitry (102) against the voltage. A source and a drain of the FET (103) are in series with the I/O node (101) and the internal circuitry (102).
Abstract:
La présente invention concerne une plaquette (10) de silicium monolithique, présentant, dans au moins un plan vertical de coupe, une alternance de zones (110) dopées n et de zones (120) dopées p, chacune des zones s'étendant sur toute l'épaisseur (e) de la plaquette, caractérisée en ce que : - lesdites zones dopées n (110) et dopées p (120) présentent chacune, dans le plan de coupe, une largeur (L 1 , L 2 ) d'au moins 1 mm; - les zones dopées n (110) présentent une concentration en donneurs thermiques à base d'oxygène distincte de celle des zones dopées p (120); et - lesdites zones dopées n (110) et lesdites zones dopées p (120) sont séparées entre elles par des zones d'isolation électrique (130). Elle concerne encore des procédés de fabrication d'une telle plaquette.
Abstract:
Integrated active area isolation structure for transistor to replace larger and more expensive Shallow Trench Isolation or field oxide to isolate transistors. Multiple well implant is formed with PN junctions between wells and with surface contacts to substrate and wells so bias voltages applied to reverse bias PN junctions to isolate active areas. Insulating layer is formed on top surface of substrate and interconnect channels are etched in insulating layer which do not go down to the semiconductor substrate. Contact openings for surface contacts to wells and substrate are etched in insulating layer down to semiconductor layer. Doped silicon or metal is formed in contact openings for surface contacts and to form interconnects in channels. Silicide may be formed on top of polycrystalline silicon contacts and interconnect lines to lower resistivity. Any JFET or MOS transistor may be integrated into the resulting junction isolated active area.
Abstract:
The present disclosed integrated circuit includes a substrate having a top surface, a buried N type layer in the substrate, N type contact region extending from the surface to the buried N type region, a buried P type region abutting and above the buried N type region in the substrate, a P type contact region extending from the surface to the buried P type region, and an N type device region in the surface and above the buried P type region. The P type impurity of the buried P type region including an impurity of a lower coefficient of diffusion than the coefficient of diffusion of the impurities of the P type contact region.