GB585114A - Improvements in and relating to the manufacture of quartz resonators - Google Patents
Improvements in and relating to the manufacture of quartz resonatorsInfo
- Publication number
- GB585114A GB585114A GB2070/45A GB207045A GB585114A GB 585114 A GB585114 A GB 585114A GB 2070/45 A GB2070/45 A GB 2070/45A GB 207045 A GB207045 A GB 207045A GB 585114 A GB585114 A GB 585114A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reagent
- crystal
- etching
- quartz
- hydrofluoric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000010453 quartz Substances 0.000 title abstract 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000013078 crystal Substances 0.000 abstract 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 6
- 239000003153 chemical reaction reagent Substances 0.000 abstract 6
- 238000005530 etching Methods 0.000 abstract 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract 4
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 239000003082 abrasive agent Substances 0.000 abstract 1
- 238000010306 acid treatment Methods 0.000 abstract 1
- 239000000908 ammonium hydroxide Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000012153 distilled water Substances 0.000 abstract 1
- 239000004519 grease Substances 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000006722 reduction reaction Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
- H03H3/04—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks for obtaining desired frequency or temperature coefficient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
585,114. Etching. BRITISH THOMSONHOUSTON CO., Ltd. Jan. 26, 1945, No. 2070. Convention date, Jan. 28, 1944. [Class 100 (ii)] [Also in Group XL] Shaped articles such as resonators of crystalline quartz have their dimensions reduced by being subjected to the dissolving action of an aqueous solution of hydrofluoric acid to which is added ammonium bifluoride to produce uniformity of dissolving action. Resonator elements of quartz are fabricated by first cutting and rough grinding to approximately the desired frequency and then chemical reduction of thickness permits further approximation to the desired frequency by unskilled labour with greater speed. The final accurate adjustment is then carried out by hand. Abrasive material from the grinding operation, embedded in the surface of the quartz blanks is removed before the timed acid treatment by an etching reagent, and grease is removed by acetone. The clean crystals are subjected for a predetermined period, at room temperature, to the etching bath comprising an aqueous solution of hydrofluoric acid and ammonium bifluoride and have a smooth polished surface after treatment. The etching rate of a reagent may be .determined by observing the change in frequency of a chosen oscillator crystal after a known period of immersion and the time required to effect a given change of frequency can be estimated. The duration of the treating time depends on the grade of crystal, temperature of the reagent, amount of material to be removed and the concentration of the reagent. The latter is restored as the reaction proceeds by the addition of anhydrous hydrofluoric acid. Crystal blanks are held in chemically inert supports and relative motion between the reagent and the crystal is produced in order to preserve contact between the crystal surface and the solution by the removal of gas bubbles. When the etching is complete all traces of the reagent are removed from the crystal to maintain its liveliness of oscillation by first rinsing with distilled water, then with a dilute solution of ammonium hydroxide, then again with water and finally with acetone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US520139A US2376219A (en) | 1944-01-28 | 1944-01-28 | Fabrication of quartz resonators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB585114A true GB585114A (en) | 1947-01-30 |
Family
ID=24071358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2070/45A Expired GB585114A (en) | 1944-01-28 | 1945-01-26 | Improvements in and relating to the manufacture of quartz resonators |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2376219A (en) |
| GB (1) | GB585114A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2493461A (en) * | 1944-05-04 | 1950-01-03 | Harvey Wells Communications In | Means and method of forming piezo-electric crystals |
| US2479286A (en) * | 1944-11-21 | 1949-08-16 | Bliley Electric Company | Production of piezoelectric crystals |
| US2617850A (en) * | 1948-06-17 | 1952-11-11 | Carmichael Hugh | Sealed insulator bushing |
| US2705392A (en) * | 1952-06-11 | 1955-04-05 | Selectronics Inc | Method of manufacture of piezo electric crystals |
| US3063881A (en) * | 1956-09-14 | 1962-11-13 | Libbey Owens Ford Glass Co | Method of making an electrically conductive article |
| US3107188A (en) * | 1960-11-21 | 1963-10-15 | Pacific Semiconductors Inc | Process of etching semiconductors and etchant solutions used therefor |
| US3059129A (en) * | 1961-03-08 | 1962-10-16 | Collins Radio Co | Pulse forming circuit using momentarily conducting transistor base-emitter leakage current to charge timing capacitor |
| US3447217A (en) * | 1964-02-05 | 1969-06-03 | Hitachi Ltd | Method of producing ceramic piezoelectric vibrator |
| US4198262A (en) * | 1979-03-29 | 1980-04-15 | Atlantic Richfield Company | Solar cell manufacture |
| NL7903389A (en) * | 1979-05-01 | 1980-11-04 | Philips Nv | METHOD FOR IMPROVING THE HEAT-DRAWING PROPERTIES OF A ROTARY TURNAROOD AND SO THAT TURNAROUNDED. |
| DE10341204A1 (en) * | 2003-09-04 | 2005-03-31 | Daimlerchrysler Ag | holder |
| CN116461023B (en) * | 2023-04-18 | 2023-10-13 | 日照皓诚电子科技有限公司 | Intelligent detection method and system for baking and curing of quartz crystal |
-
1944
- 1944-01-28 US US520139A patent/US2376219A/en not_active Expired - Lifetime
-
1945
- 1945-01-26 GB GB2070/45A patent/GB585114A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2376219A (en) | 1945-05-15 |
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