Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7109635 | Wafer level packaging of materials with different coefficients of thermal expansion An electro-mechanical device package includes a cap material permanently bonded to a device wafer encapsulating an electromechanical device. An intermediate material is used to bond the device and capping material together at a low temperature, and a structure inclu... | 09/19/2006 |
| 7105980 | Saw filter device and method employing normal temperature bonding for producing desirable filter production and performance characteristics A SAW filter includes a piezoelectric substrate of Lithium Niobate or optionally Lithium Tantalate having a thickness of at least twice an acoustic wavelength. The piezoelectric substrate is bonded to a surrogate substrate of a silicon material. The surrogate substr... | 09/12/2006 |
| 7100451 | Surface acoustic wave sensing system and method for measuring pressure and temperature A surface acoustic wave (SAW) sensor and an interrogator that transmits a noise source to the sensor for receiving an interrogation signal that is processed and compared to the source signal provides pressure and temperature measurements. One SAW sensor a single int... | 09/05/2006 |
| 6928718 | Method for array processing of surface acoustic wave devices An assembly and method for array processing of hermetically sealed Surface Acoustic Wave (SAW) Devices employs a non-conductive material having an array of spaced cavities extending into the material for receiving a SAW die face down, in a flip-chip arrangement. Eac... | 08/16/2005 |
| 6861927 | Longitudinally coupled leaky surface acoustic wave resonator filter A longitudinally coupled leaky surface acoustic wave (LSAW) resonator filter has a wide bandwidth, low insertion loss and return loss characteristics, and high power handling capability. The LSAW resonator filter includes a plurality of longitudinally coupled LSAW r... | 03/01/2005 |
| 6833774 | Surface acoustic wave filter A SAW filter includes a piezoelectric substrate of a single crystal LiNbO3 and SAW resonators having an electrode thickness ranging from about 8% to about 9% of an acoustic wavelength of a high velocity SAW excited on the surface of the substrate. The pie... | 12/21/2004 |
| 6798318 | Hybrid leaky surface acoustic wave resonator filter A hybrid leaky surface acoustic wave (LSAW) resonator filter has a wide bandwidth, low insertion loss and return loss, and excellent rejection of frequencies outside the passband, and includes one or more longitudinally coupled LSAW resonator filter tracks with chir... | 09/28/2004 |
| 6661313 | Surface acoustic wave devices using optimized cuts of lithium niobate (LiNbO3) A surface acoustic wave device includes a piezoelectric substrate of a single crystal LiNbO3 and an electrode pattern provided on a surface of the piezoelectric substrate which forms a resonator having an electrode thickness in a range of about... | 12/09/2003 |
| 6571638 | Surface-acoustic-wave pressure sensor and associated methods A pressure and temperature sensor includes a sealed insulating package and an elastic, piezoelectric substrate deformably supported within the package. At least three surface-acoustic-wave resonators are affixed to a bottom of the substrate. A first and a... | 06/03/2003 |
| 6566980 | Die layout for SAW devices and associated methods A surface-acoustic-wave die includes a generally rectangular die that comprises a piezoelectric material, atop which is positioned a surface-acoustic-wave electrode pattern. The pattern has a generally rectangular footprint, and the footprint has a top ed... | 05/20/2003 |
| 6559739 | String weighted surface acoustic wave transducer Surface-acoustic-wave transducers include interdigital electrode fingers alternately connected to hot and ground bus bars. The gap between two adjacent electrodes has a relative tap weight proportional to the voltage difference between the two electrodes.... | 05/06/2003 |
| 6556104 | Surface acoustic wave devices using optimized cuts of a piezoelectric substrate A surface acoustic wave device includes a piezoelectric substrate of a single crystal LiTaO3 and an electrode pattern provided on a surface of the piezoelectric substrate which forms a resonator having an electrode thickness in a range of about... | 04/29/2003 |
| 6105226 | Leadless ceramic chip carrier crosstalk suppression method A leadless ceramic chip carrier useful in surface mounting of SAW devices includes electrically conductive vias and metalization between input and output bond pads for improved crosstalk suppression between input and output device connections. A protrusio... | 08/22/2000 |
| 6097131 | Optimal cut for SAW devices on langatate A lanthanum gallium tantalate single crystal substrate, referred to as langatate, has a prescribed range of Euler angles for substrate and crystal orientation for improving signal processing for a surface acoustic wave (SAW) device. When a voltage is appl... | 08/01/2000 |
| 6072264 | Optimal cut for surface wave propagation on langasite substrate A lanthanum gallium silicate single crystal substrate, referred to as langasite, has a prescribed range of Euler angles for substrate and crystal orientation for improving signal processing for a surface acoustic wave (SAW) device. When a voltage is appli... | 06/06/2000 |
| 6054794 | Optimal cut for wave propagation surface on langanite substrate A lanthanum gallium niobate single crystal substrate, referred to as langanite, has a prescribed range of Euler angles for substrate and crystal orientation for improving signal processing for a surface acoustic wave (SAW) device. When a voltage is applie... | 04/25/2000 |
| 6031315 | Optimal cut for saw devices on quartz A quartz single crystal substrate (12), includes a prescribed range of Euler angles for substrate and crystal orientation which improves signal processing for surface acoustic wave (SAW) devices (10). When a voltage is applied to an input inter digital tr... | 02/29/2000 |
| 6011693 | Slotted printed circuit board surface mount stress relief system A surface mounting stress relief system for mounting a surface mount package such as a leadless ceramic chip carrier on a printed circuit board includes a printed circuit board having a top layer attached to a bottom layer. The top layer includes cavities... | 01/04/2000 |
| 5917265 | Optimal cut for saw devices on langasite A lanthanum gallium silicate single crystal substrate, referred to as langasite, has a prescribed range of Euler angles for substrate and crystal orientation for improving signal processing for a surface acoustic wave (SAW) device. When a voltage is appli... | 06/29/1999 |
| 5905325 | Optimal cut for saw devices on langanite A lanthanum gallium niobate single crystal substrate, referred to as langanite, has a prescribed range of Euler angles for substrate and crystal orientation for improving signal processing for a surface acoustic wave (SAW) device. When a voltage is applie... | 05/18/1999 |
| 5866867 | Surface mount package seam welder apparatus and method A seam welder for sealing a cover of a surface mount package to its carrier includes a table for receiving a fixture which itself carried surface mount packages to be welded for sealing an electronic component therein. Electrical current to welding electr... | 02/02/1999 |
| 5864092 | Leadless ceramic chip carrier crosstalk suppression apparatus A leadless ceramic chip carrier useful in surface mounting of SAW devices includes electrically conductive vias and metalization between input and output bond pads for improved crosstalk suppression between input and output device connections. A protrusio... | 01/26/1999 |
| 5831167 | Time domain delay device measurement apparatus including sensor package A sensing apparatus includes a sensor package for generating an output signal responsive to a sensed quantity. The sensor package includes a surface acoustic wave (SAW) sensor and driver driver circuit mounted within a common package to facilitate connect... | 11/03/1998 |
| 5831492 | Weighted tapered spudt saw device Selected transducer geometries including unbalanced split electrode and three electrode per wavelength structures are employed for use in wide band tapered SAW devices. Combining geometries useful in narrow bandwidth SAW filters for canceling reflected wa... | 11/03/1998 |
| 5831494 | Dual track low-loss reflective saw filter A dual track, low signal loss surface acoustic wave filter includes tapered transducers and tapered reflectors within an axis of propagation for each track to achieve an improved pass band response associated with tapered transducers. The bandwidth of the... | 11/03/1998 |
| 5818310 | Series-block and line-width weighted saw filter device Surface acoustic wave (SAW) filter performance is enhanced using series-block weighting and line-width weighting combined for providing a transducer having a finely adjusted uniform weighting across the beam profile. Such a transducer permits practical tr... | 10/06/1998 |
| 5804729 | Apparatus and associated method for measuring differences in delay measurements A sensing apparatus includes a pulse recirculating circuit operatively connected to at least one ultrasonic delay sensor or other device for recirculating pulses therethrough, and a measurement difference output circuit for generating an output signal bas... | 09/08/1998 |
| 5700952 | Time domain delay measurement apparatus and associated method An embodiment of a sensing apparatus includes an ultrasonic delay sensor having a delay related to the sensed quantity; and a time domain analysis circuit for recirculating pulses through the ultrasonic delay sensor or device and for generating the output... | 12/23/1997 |
| 5698786 | Differential phase velocity determining delay measurement apparatus and associated method An apparatus includes an ultrasonic delay sensor or device having a delay related to the sensed quantity; a pulse recirculating circuit for recirculating pulses through the ultrasonic delay sensor for generating a pulse repetition signal having a frequenc... | 12/16/1997 |
| 5690270 | Surface mounting stress relief device and method A device and method for mounting a surface mount package onto a printed circuit board includes inserting a pin through a printed circuit board feedthrough for providing movement of the pin within the feedthrough. One end of the pin is soldered to conducti... | 11/25/1997 |
| 5573172 | Surface mount stress relief hidden lead package device and method A hidden lead package device is configured to be placed between a leadless component such as a surface mount package (SMP) used to house a SAW device and a standard printed circuit board configured for solder joints in a leadless contact with the printed ... | 11/12/1996 |
| 5369551 | Surface mount stress relief interface system and method An interface printed circuit board is configured to be placed between a leadless component such as a surface mount package used to house a SAW device and a standard printed circuit board configured for solder joints in a leadless contact with the printed ... | 11/29/1994 |
| 5111167 | Surface acoustic wave device and method utilizing plural multi-strip couplers A surface acoustic wave device employs in-line input and output transducers disposed on a piezoelectrically active surface. Two U-configured multi-strip couplers are disposed between the input and output transducers in an overlapped, opposing configuratio... | 05/05/1992 |
| 5077545 | Surface acoustic wave waveguide-coupled resonator notch filter A surface acoustic wave (SAW) waveguide-coupled resonator filter is overcoupled to produce an essentially constant conductance and susceptance over at least the bandwidth of a desired notch filter. The SAW resonator filter is embedded in a bridged-T allpa... | 12/31/1991 |
| 4684783 | Environmental control apparatus for electrical circuit elements An environmental control apparatus for electronic circuit elements includes an enclosure for the element and standoff brackets supporting the enclosure, the enclosure and support brackets together defining an area of both high heat resistivity and high he... | 08/04/1987 |
| 4622525 | Low loss surface acoustic wave device and method A surface acoustic wave device in a piezoelectric medium includes input and output transducers for launching and detecting a surface acoustic wave along the piezoelectric medium. The device is arranged in a ring loop to process the bidirectional acoustic ... | 11/11/1986 |
