IEC_60758-2016.pdf

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 reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch A bout the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical infor mation on IEC Inter national Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Andr oid Tablets and iPad.IEC publications search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criter ia(r efer ence number,text,technical committee,).It also gives information on pr ojects,replaced and w ithdr awn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The w or lds leading online dictionary of electronic and electr ical terms containing 20 000 ter ms and definitions in English and French,w ith equivalent terms in 15 additional languages.Also k now n as the International Electr otechnical Vocabulary (IEV)online.IEC Glossary -std.iec.ch/glossary 65 000 electrotechnical ter minology entr ies in English and French extr acted from the Terms and Definitions clause of IEC publications issued since 2002.Some entr ies have been collected fr om earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Serv ice Centre-webstore.iec.ch/csc If you w ish to give us y our feedback on this publication or need further 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 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 values.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 classification 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 Orientation.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 optical 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 5.1 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