Piezoelectric quartz plate and method of cutting same

Details Piezoelectric quartz plate and method of cutting same Piezoelectric quartz plate and method of cutting same

2006-05-30

2006-05-30

Rachuba, M. (Department: 3723)

Stone working

Sawing

Rotary

C029S025350, C310S361000, C310S31300R, C310S360000

Reexamination Certificate

active

07051728

ABSTRACT:
A piezoelectric quartz plate having reduced frequency deviation as a function of temperature, wherein the quartz plate is cut at an angle described by:Tf=⁢3.9+6.5⁢⁢cos2⁢⁢θ+⁢12⁡[c66⁢Tc66⁢sin2⁢θ+c44⁢Tc44⁢cos2⁢θ+Tc14⁢c14⁢sin⁢⁢2⁢⁢θc66⁢sin2⁢θ+c44⁢cos2⁢θ+c14⁢sin⁢⁢2⁢⁢θ]+⁢[a′·(sin⁡(ω·θ+ϕ′)+sin⁡(ω·θ+ϕ′)2)]+δwhere quartz plate thickness is chosen in accordance with a desired frequency. This useful behavior can be manipulated such that a quartz plate is designed to counteract frequency shifts over temperature excursion of other electrical components found in typical oscillator circuits. The choice of angles of cut having larger margins of error means that quartz oscillators can be more easily reproduced on a large scale and at a lower cost than has traditionally been the case.

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