John Mattson

US Patent:

58770429, Mar 2, 1999

Filed:

Aug 28, 1996

Appl. No.:

8/697712

Inventors:

John E. Mattson - Palatine IL
William G. Skoda - Oak Park IL
Piyush Chaudhari - Palatine IL
Joyce K. Yamamoto - Albuquerque NM
Ross A. Miesem - Albuquerque NM

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01L 2144

US Classification:

438123

Abstract:

A method of producing a glass/metal package where a glass portion of the package is built up around a provided leadframe (10) using applications of solderable and glass pastes (20) which are subsequently fired (30). The glass paste and leadframe are chosen to have similar coefficients of expansion and the leadframe is pretreated to degasify and control oxidation of the metal to promote glass adhesion to the leadframe and prevent microcracking at a glass/metal interface. A seal ring is applied to the glass paste (40) and a lid is attached to the seal ring (50). The package is used to provide an sealed inert internal environment for sensitive electronic components such as a piezoelectric element. The package may be configured for leaded or surface mounting (60).

US Patent:

58567283, Jan 5, 1999

Filed:

Feb 28, 1997

Appl. No.:

8/810308

Inventors:

Charles L. Zimnicki - Bartlett IL
John Mattson - Palatine IL

Assignee:

Motorola Inc. - Schaumburg IL

International Classification:

H05B 3702

US Classification:

315209PZ

Abstract:

A power transformer circuit (100) includes a capacitor (120) and a resonator (140). The resonator (140) is coupled in series with the capacitor (120) and is operable to provide a substantially inductive impedance between its terminals (142,144). Resonator (140) is preferably implemented as a piezoelectric lithium niobate resonator that is operated in a thickness-shear mode. In a preferred embodiment, power transformer circuit (100) is employed as a series resonant output circuit in an electronic ballast (500) for powering at least one gas discharge lamp (30).

US Patent:

58150544, Sep 29, 1998

Filed:

May 27, 1997

Appl. No.:

8/863404

Inventors:

Bruce Vojak - Wheaton IL
Jiashi Yang - Schaumburg IL
Jin Huang - Hoffman Estates IL
John Mattson - Palatine IL

Assignee:

Motorola Inc. - Schaumburg IL

International Classification:

H03H 9205
H03H 956

US Classification:

333191

Abstract:

A high frequency acoustic wave piezoelectric device (10) having parallel etched channels cut into a surface of a piezoelectric substrate so as to form micromachined ridges (20). Top electrodes (30) are located on tops (26) of the ridges (20) and bottom electrodes (32) are located on bottoms of the channels in spacings (22) between ridges (20). The top and bottom electrodes (30, 32) are offset from each other and substantially non-opposing. The electrodes (30, 32) generate a sufficient vertical electrical field (38) when driven to cause the ridges (20) to resonate. A height (28) of the ridges (20) define the operating frequency. The ridges (20) can be made small enough to produce frequencies well over 100 MHz in a fundamental bulk acoustic wave mode.

US Patent:

59030879, May 11, 1999

Filed:

Aug 29, 1997

Appl. No.:

8/920442

Inventors:

John E. Mattson - Streamwood IL
James F. Caruba - Bartlett IL
Charles Zimnicki - Bartlett IL
Beverly A. Carroll - Marengo IL

Assignee:

Motorola Inc. - Schaumburg IL

International Classification:

H01L41/08

US Classification:

310365

Abstract:

A resonator (104) including a piezoelectric plate (102) with an electrode (108) having a random pattern (100) along a portion of an edge of the electrode (108). The random pattern (100) dampens or destructively interferes with undesirable and inharmonic vibrational modes. For example, a rectangular AT-cut quartz resonator, which vibrates in a thickness-shear mode may also possess undesirable flexure and face-shear modes. These modes not only present undesirable spurious frequencies, they also change over temperature, disturbing a frequency-ternperature response of the resonator. The random pattern (100) causes diffuse and/or specular scattering to reduce these undesirable modes, providing a more uniform frequency-temperature response which is beneficial in temperature compensated crystal oscillator applications.

US Patent:

59694629, Oct 19, 1999

Filed:

Jun 18, 1998

Appl. No.:

9/099156

Inventors:

Jin Huang - Hoffman Estates IL
Charles L. Zimnicki - Bartlett IL
John E. Mattson - Streamwood IL

Assignee:

CTS Corporation - Elkhart IN

International Classification:

H03H 915
H01L 41107

US Classification:

310318

Abstract:

A piezoelectric resonator (10) includes a single crystal elongated plate (12) having a transverse extensional mode of oscillation. Two sets of split electrodes (20,22,30,32) are provided on the surfaces (14,16) of the plate (12) to define two acoustically coupled oscillating regions (24,26) therebetween. The oscillating regions (24,26) present a similar inductance and have similar performance to allow the use of the resonator (10) in a double-ended electrical transformer circuit (100). An AC source (112) drives non-opposing top and bottom electrodes of the resonator (110). The remaining electrodes are coupled with shunt capacitors to provide two resonant LC circuits with the resonator (110) so as to provide a voltage gain for driving a load.