Abstract:
Coplanar waveguides have a center signal line and a pair of ground lines on either side formed of a sputtered material such as gold (Au). Such waveguides are subject to what is known as the edge effect at high frequency operation causing currents to concentrate and flow along adjacent edges of the lines. Providing a thicker plated layer only on adjacent edges of the lines provide substantial performance improvements over sputtered lines alone while saving significant amount of Au, thus reducing costs.
Abstract:
A microelectronic die is aligned with a package substrate and attached to it using solder balls. A specially shaped heat spreader, preferably with a coefficient of thermal expansion (CTE) similar to that of silicon, is attached to the back side of the die using a heat-conducting adhesive. An epoxy-based material is flowed into the gap between the die, the substrate, and the heat spreader via a through-hole in either the substrate or the heat spreader using a dispense process or a transfer molding process. By positioning the heat spreader to abut the die corners and/or edges, the stresses on the die are substantially reduced or eliminated.
Abstract:
A microelectronic die is aligned with a package substrate and attached to it using solder balls. A specially shaped heat spreader, preferably with a coefficient of thermal expansion (CTE) similar to that of silicon, is attached to the back side of the die using a heat-conducting adhesive. An epoxy-based material is flowed into the gap between the die, the substrate, and the heat spreader via a through-hole in either the substrate or the heat spreader using a dispense process or a transfer molding process. By positioning the heat spreader to abut the die corners and/or edges, the stresses on the die are substantially reduced or eliminated.
Abstract:
A method for polishing a surface of metal on a semiconductor substrate by using a polishing pad and hydrogen peroxide, and removing particles of metal from the semiconductor substrate by polishing, and dissolving the particles in the quantity of hydrogen peroxide.
Abstract:
The invention relates to a method of routing a call in a network having a plurality of nodes interconnected by trunks, the method including calculating the costs of different routes for taking the call, and selecting a route as a function of cost. According to the invention, the cost of a route is a function of the bandwidth available on the trunks making up the route, of the resources available on said trunks, and of the bandwidth required for the call. The cost of a trunk can be represented in the form of a vector whose first component is a decreasing function of the available bandwidth, and whose second component is a decreasing function of available resources. The invention makes it possible, when routing a call, to take account of quality of service in terms of bandwidth. If the second component is a function that has a value that is constant above some quantity of available resources, then the invention makes it possible to limit the number of routing calculations performed, and to avoid making new routing calculations so long as the topology of the network remains unchanged.
Abstract:
An integrated circuit including a die having a circuit area and a plurality of guard rings. The circuit area includes active devices, passive devices, and interconnects connected to form an integrated circuit. The plurality of guard rings includes a plurality of stacked guard rings having substantially equal widths and encircling the circuit area. Alternatively, the plurality of guard rings includes metallization level guard rings interleaved with one or more via level guard rings. Each of the one or more via level guard rings includes one or more guard rings encircling the circuit area. Alternatively, the plurality of guard rings includes a plurality of concentric guard rings encircling the circuit area. Each of the plurality of guard rings is fabricated from a metal, such as aluminum, copper, or silver, or an alloy of aluminum, copper, or silver.
Abstract:
According to one embodiment a microelectromechanical (MEMS) switch is disclosed. The MEMS switch includes a top movable electrode, and an actutaion electrode with an undoped polysilicon stopper region to contact the top movable electrode when an actuation current is applied. The undoped polysilicon stopper region prevents actuation charging that accumulates over time in a unipolar actuation condition.
Abstract:
This application discloses a microelectromechanical (MEMS) switch apparatus comprising an anchor attached to a substrate and an electrically conductive beam attached to the anchor and in electrical contact therewith. The beam comprises a tapered portion having a proximal end and a distal end, the proximal end being attached to the anchor, an actuation portion attached to the distal end of the tapered portion, a tip attached to the actuation portion, the tip having a contact dimple thereon. The switch apparatus also includes an actuation electrode attached to the substrate and positioned between the actuation portion and the substrate. Additional embodiments are also described and claimed.
Abstract:
Context-based contact information retrieval systems and methods that automatically extract contact information from a user's context, allow a user to capture, reuse and share personal and organizational contacts in the form of a business card or an audio/video recording, as desired. In various embodiments, contacts are retrieved based on the user's context and are presented in a manner that does not disrupt the user's current task. In various embodiments, the user accesses the details of the contacts with a single interaction. In various embodiments, the systems and methods monitor the user's current context and check for matches. The systems and methods then assign a score to each match and unobtrusively present at least some of the matches to the user based on the assigned score.
Abstract:
This application discloses a microelectromechanical (MEMS) switch apparatus comprising an anchor attached to a substrate and an electrically conductive beam attached to the anchor and in electrical contact therewith. The beam comprises a tapered portion having a proximal end and a distal end, the proximal end being attached to the anchor, an actuation portion attached to the distal end of the tapered portion, a tip attached to the actuation portion, the tip having a contact dimple thereon. The switch apparatus also includes an actuation electrode attached to the substrate and positioned between the actuation portion and the substrate. Additional embodiments are also described and claimed.