Abstract:
A bonding pad structure and fabrication method thereof. A bonding pad is substantially surrounded and insulated by a dielectric layer, wherein the bonding pad is formed of at least one first conductive layer having a wiring layer with a stripe layout and a first edge portion, a second conductive layer having a wire bonding portion and a second edge portion and a plurality of plugs electrically connecting the wiring layer and the wire bonding portion. A conductive structure of an array of metal plugs or a metal damascene structure is formed to connect the first edge portion and the second edge portion, thereby preventing burn out of the first edge portion during an ESD event.
Abstract:
An electrostatic discharge (ESD) protection device includes a diode located in a substrate and an N-type metal oxide semiconductor (NMOS) device located in the substrate adjacent the diode, wherein both the diode and the NMOS are coupled to an input device, and at least a portion of the diode and at least a portion of the NMOS device collectively form an ESD protection device.
Abstract:
Provided are an electrostatic discharge (ESD) protection device and a method for making such a device. In one example, the ESD protection device includes a Zener diode region formed in a substrate and an N-type metal oxide semiconductor (NMOS) device formed adjacent to the Zener diode region. The Zener diode region has two doped regions, a gate with a grounded potential positioned between the two doped regions, and two light doped drain (LDD) features formed in the substrate. One of the LDD features is positioned between each of the two doped regions and the gate. The NMOS device includes a source and a drain formed in the substrate and a second gate positioned between the source and the drain.
Abstract:
The invention describes structures and a process for providing ESD protection between multiple power supply lines or buses on an integrated circuit chip. Special diode strings are used for the protection devices whereby the diodes are constructed across the boundary of an N-well and P substrate or P-well. The unique design provides very low leakage characteristics during normal circuit operation, as well as improved trigger voltage control achieved by stacking 2 or more diodes in a series string between the power buses.
Abstract:
The present disclosure provides a deep submicron electrostatic discharge (ESD) protection structure for a deep submicron integrated circuit (IC) and a method for forming such a structure. The structure includes at least two electrodes separated by a dielectric material, such as a thin gate oxide layer. In some examples, the thin gate oxide may be less than 25 Å thick. A source and drain are positioned proximate to and on opposite sides of one of the electrodes to form a channel. The drain is covered with a silicide layer that enhances the ESD protection provided by the structure. The source may also be covered with a silicide layer. In some examples, the drain may be floating.
Abstract:
Disclosed are structures and a method to increase the power dissipation of an output pad of an integrated circuit during electrostatic discharge (ESD) by preventing ESD current from flowing through resistive means between that output pad and an internal circuit. By splitting the active region and thereby creating a bipolar transistor which connects directly to the output pad, the resistive means is shunted when the bipolar transistor together with an already existing parasitic bipolar transistor conduct during ESD. Current flow in the resistive means is therefore eliminated and with it damaging power dissipation.
Abstract:
A combination erase method to erase data from a flash EEPROM eliminates electrical charges trapped in the tunneling oxide of a flash EEPROM to maintain proper separation of the programmed threshold voltage and the erased threshold voltage after extended programming and erasing cycles. A first embodiment method to erase a flash EEPROM cell begins by negative gate erasing to remove charges from the floating gate, followed by a source erasing to further remove charges from the floating gate, and finally followed by a channel erasing to detrap charges. A second embodiment begins with a negative gate erasing having a incremental stepping of the voltages to remove the charges from the floating gate. This followed by a source erasing to detrap the tunneling oxide of the EEPROM cell. A third embodiment begins with a source erasing having a incremental stepping of the voltages to remove the charges from the floating gate. This followed by a channel erasing to detrap the tunneling oxide of the EEPROM cell.
Abstract:
The invention describes a structure and a process for providing ESD semiconductor protection with reduced input capacitance. The structure consists of a heavily doped P+ contact area residing in an N well region on a P substrate and electrically connected to the input pad of active integrated field effect transistor devices. NFET devices with floating gates and drains to reduce capacitance are located in the substrate near the N-well. The NFET source elements as well as the substrate are connected to ground. The NFETs are isolated from the N-well and associate P+ contact area by shallow trench isolation (STI) structures that reduce the NFET drain to substrate and N-well to substrate junction boundary area with a subsequent reduction in the junction capacitance. A voltage pulse from an ESD event will cause the SCR structure and associated parasitic bipolar transistors to trigger providing a path to ground for the ESD current, thereby protecting the internal circuits from damage.
Abstract:
An MOS integrated circuit, such as an input-output buffer, exhibits improved resistance to damage from electrostatic discharge (ESD) by balancing the ESD current flow through active and inactive sections of drivers. Better balance of the ESD current flow is achieved by increasing the width and length of nulti-finger channels of semiconductor material defining the gates of the drivers in the active section. Wider, longer gates of the drivers in the active section increase their ability to carry current, thereby resulting in a more symmetrical distribution of ESD current between the active and inactive sections without degrading the IC's normal performance.
Abstract:
An ESD protection circuit that will prevent internal circuits of an integrated circuit is formed on a semiconductor substrate to prevent damage during extreme voltage levels from an ESD voltage source and is connected to an input/output pad. A plurality of drains of multiple MOS FET's is formed within the surface of the semiconductor substrate and are each connected to the input/output pad. A plurality of sources of the multiple MOS FET's is formed within the surface of the semiconductor substrate and are placed at a distance from the plurality of drains and are connected to a ground reference potential. Pairs of the plurality of sources are adjacent to each other. A plurality of isolation regions placed between each source of the pairs of sources and are allowed to float. The multiple MOS FET's have a plurality of parasitic bipolar junction transistors. When contacting an ESD voltage source to the collectors of the plurality of parasitic bipolar junction transistors, the junction formed between the collector and the base of the parasitic bipolar junction transistor enters into avalanche breakdown. The avalanche breakdown generates a large current through the substrate bulk resistances that is sufficiently large as to cause the base emitter junctions of all the parasitic bipolar junction transistors and turn on the parasitic bipolar junction transistors. The conduction of all the parasitic bipolar junction transistors is sufficient to cause the ESD voltage to be discharged thus preventing damage to the internal circuitry.