Abstract:
A structure/method for reducing the stress between a dielectric, passivation layer and a metallic structure comprising coating the metallic structure with a low stress modulus buffer material, and forming the dielectric passivation layer covering the low stress modulus buffer material. The low stress modulus buffer material is composed of a layer of a polymeric material selected from at least one of the group consisting of a hydrogen/alkane SQ (SilsesQuioxane) resin, polyimide, and a polymer resin. The dielectric, passivation layer is composed of at least one layer of a material selected from at least one of the group consisting of silicon oxide and silicon nitride. A protective layer is formed over the dielectric, passivation layer. The low stress modulus buffer material has a thermal coefficient of expansion between that of the metallic structure and that of the dielectric passivation layer. In particular, the dielectric passivation layer between the metallic structure and the low stress modulus buffer material has a thermal coefficient of expansion between about 5ppm/ DEG C and about 20ppm/ DEG C.
Abstract:
Disclosed is a method and structure for an integrated circuit structure that includes a plurality of complementary metal oxide semiconductor (CMOS) transistors (116) and a plurality of vertical bipolar transistors (118) positioned on a single substrate (110). The vertical bipolar transistors (118) are taller devices than the CMOS transistors (116). In this structure, a passivating layer (112) is positioned above the substrate (110), and between the vertical bipolar transistors (118) and the CMOS transistors (116). A wiring layer (120) is above the passivating layer (112). The vertical bipolar transistors (118) are in direct contact with the wiring layer (120) and the CMOS transistors (116) are connected to the wiring layer (114) by contacts extending through the passivating layer (112).
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and method for mitigating a leakage current of a semiconductor device before catastrophic leakage current runaway occurs.SOLUTION: A leakage current shift monitor unit 20 is electrically connected to an output node of a leakage current target unit 10 and collects leakage currents from a selected target semiconductor device for two consecutive predefined temporal periods and measures the difference between the collected leakage currents. A comparator 40 receives and compares the outputs of the current shift monitor unit 20 and a reference voltage generator 30. The comparator 40 propagates an alert signal to the leakage current target unit 10 when the leakage voltage output from the leakage current shift monitor unit 20 exceeds the reference voltage, that is, a condition that indicates that the leakage current is about to approach catastrophic runaway levels. This alert signal attains leak mitigation also including a repair voltage to be applied to a gate of the target semiconductor device.
Abstract:
A method for recovery of degradation caused by avalanche hot carriers is provided that includes subjecting an idle bipolar transistor exhibiting avalanche degradation to a thermal anneal step which increases temperature of the transistor thereby recovering the avalanche degradation of the bipolar transistor. In one embodiment, the annealing source is a self-heating structure that is a Si-containing resistor that is located side by side with an emitter of the bipolar transistor. During the recovering step, the bipolar transistor including the self-heating structure is placed in the idle mode (i.e., without bias) and a current from a separate circuit is flown through the self-heating structure. In another embodiment of the present, the annealing step is a result of providing a high forward current (around the peak fT current or greater) to the bipolar transistor while operating below the avalanche condition (V CB of less than 1 V). Under the above conditions, about 40% or greater of the degradation can be recovered. In yet another embodiment of the present invention, the thermal annealing step may include a rapid thermal anneal (RTA), a furnace anneal, a laser anneal or a spike anneal.
Abstract:
PROBLEM TO BE SOLVED: To provide a structure of power grid for supplying electric power to semiconductor devices, and a method of producing the structure.SOLUTION: An embodiment of the invention provides a semiconductor structure, which may include a stud of a first conductive material formed inside a dielectric layer; a via of a second conductive material having a bottom and sidewalls that are covered with a conductive liner, in which the bottom is formed directly on top of the stud and in contact with the via through the conductive liner; and one or more conductive paths of a third conductive material connecting to the via through the conductive liner at the sidewalls of the via. The method of producing the semiconductor structure is also provided.
Abstract:
PROBLEM TO BE SOLVED: To provide a structure and method of fabricating an interconnect structure with a bi-layer metal cap. SOLUTION: In one embodiment, this method of fabricating an interconnect structure with a bi-layer metal cap includes the steps of: forming an interconnect structure portion in a dielectric material layer; and forming a bi-layer metallic cap on the top surface of an interconnect structure portion. This method also includes the step of depositing the blanket layer of a dielectric capping layer, which covers the exposed surface of the dielectric material layer and the surface of a bi-layer metallic cap. The bi-layer metallic cap comprises: a metal capping layer formed on the conductive surface of an interconnect structure portion; and metal nitride formed on the top portion of the metal capping layer. The interconnect structure comprises: an interconnect structure portion formed in the dielectric layer: a bi-layer metallic cap formed on the top portion of the interconnect structure portion; and a dielectric capping layer formed on the bi-layer metallic cap. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A back end of the line (BEOL) fuse structure having a stack of vias (122, 132). The stacking of vias (122, 132) leads to high aspect ratios making liner and seed coverage inside the vias poorer. The weakness of the liner (124) and seed layers leads to a higher probability of electromigration (EM) failure. The fuse structure addresses failures due to poor liner and seed coverage. Design features permit determining where failures occur, determining the extent of the damaged region after fuse programming and preventing further propagation of the damaged dielectric region.