1、 IEC 60758 Edition 5.0 2016-05 INTERNATIONAL STANDARD Synthetic quartz crystal Specifications and guidelines for use IEC 60758:2016-05(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be re
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10、assistance,please contact the Customer Ser vice Centr e:csciec.ch.IEC 60758 Edition 5.0 2016-05 INTERNATIONAL STANDARD Synthetic quartz crystal Specifications and guidelines for use INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.140 ISBN 978-2-8322-3395-5 Registered trademark of the International
11、Electrotechnical Commission Warning!Make sure that y ou obtained this publication from an authorized distributor.2 IEC 60758:2016 IEC 2016 CONTENTS FOREWORD.6 INTRODUCTION.8 1 Scope.9 2 Normative references.9 3 Terms and definitions.9 4 Specification for synthetic quartz crystal.13 4.1 Standard valu
12、es.13 4.1.1 Shape of synthetic quartz for optical applications.13 4.1.2 Orientation of the seed.13 4.1.3 Inclusion density.13 4.1.4 Striae in synthetic quartz for optical applications.14 4.1.5 Infrared quality indications of 3 500 and 3 585 for piezoelectric applications.14 4.1.6 Grade classificatio
13、n by value and Schlieren method for optical applications.15 4.1.7 Frequency-temperature characteristics of synthetic quartz for piezoelectric applications.15 4.1.8 Etch channel density .15 4.1.9 Internal transmittance for optical applications.16 4.2 Requirements and measuring methods.17 4.2.1 Orient
14、ation.17 4.2.2 Handedness.18 4.2.3 Synthetic quartz crystal dimensions.18 4.2.4 Seed dimensions.19 4.2.5 Imperfections.19 4.2.6 Evaluation of infrared quality by measurement.22 4.2.7 Frequency versus temperature characteristics for piezoelectric applications.24 4.2.8 Striae in synthetic quartz for o
15、ptical applications.25 4.2.9 Growth band in synthetic quartz for optical applications.25 4.2.10 Etch channel density.26 4.2.11 Internal transmittance for optical applications.27 4.3 Marking.27 4.3.1 General.27 4.3.2 Shipping requirements.28 5 Specification for lumbered synthetic quartz crystal.28 5.
16、1 Standard values.28 5.1.1 Tolerance of dimensions.28 5.1.2 Reference surface flatness.29 5.1.3 Angular tolerance of reference surface.29 5.1.4 Centrality of the seed.30 5.2 Requirements and measuring methods.31 5.2.1 As-grown quartz bars used for lumbered quartz bars.31 5.2.2 Dimensions of lumbered synthetic quartz crystal.31 5.2.3 Identification on reference surface.31 5.2.4 Measurement of reference surface flatness.31 IEC 60758:2016 IEC 2016 3 5.2.5 Measurement of reference surface angle tole