Tag: MIL-PRF-38534

MIL-PRF-38534 Hybrid Microcircuit Specification

MIL-PRF-38534 for hybrid microcircuits has been revised.  The new Revision K is available from Document Center Inc. now.  It’s titled Hybrid Microcircuits, General Specification for.  The performance specification replaced the obsolete MIL-STD-1772 back in 1996.  It’s used for meeting the requirements for hybrid microcircuits used in government procurement.  If you use this specification, you’ll need to meet the new updates by May 15, 2018.

The 175-page MIL-PRF-38534 Revision K covers hybrid microcircuits, multi-chip modules (MCM) and similar devices.  Verification requirements are provided so that the manufacturer can meet applicable performance requirements for U.S. military use.  Appendix A authorizes the use of 1 of 2 listed quality programs to verify compliance.  Also included are the requirements for QML listing (Qualified Manufacturers List).  FYI: The QML information is now maintained in a database by the Department of Defense.

This is an overview document, with detailed specification requirements provided by SMDs (Standard Microcircuit Drawings) and other specifications.  In order to have your products authorized for procurement and for inclusion in products sold to the military, these general requirements must be met.  So Appendix C defines generic performance verifications, Appendix D is on generic performance requirements for non-hermetic device technologies, and so on.

For those of you using the publication, you’ll want to know where the changes in the specification are.  Instead of the usual black lines, asterisks are provided in the margins notating where the changes have been made.  As usual, the document notes that these have been provided as a convenience only.  This means that if there are changes that were not marked, you’ll still be liable if you don’t meet the update.

Of course, you’re going to need this new update, since there are many changes throughout the specification.  Use Document Center Inc. for your purchase.  We provide you with options for delivery format and for payment.  And all standards sales come with our “best-in-class” notification included in the price of the publication.  You can search for and order government standards and other publications at our web store, www.document-center.com.  Here is a link directly to the order page for MIL-PRF-38534.

Document Center Inc. has been working with the defense contracting community since 1982.  We have a good understanding of the challenges facing this sector and products and services to make your life easier.  To learn more, reach out to us by phone (650-591-7600) or email (info@document-center.com).  We are your Standards Experts!

New MIL-PRF-38534 letter for monolithic hybrids

Users of MIL-PRF-38534, “Hybrid Microcircuits, General Specification for,” will want to be aware that the DoD has released a letter with information of importance to hybrid microcircuit manufacturers.  The letter addresses a legacy issue stemming back to the mid-1990’s.  It clarifies the position of the DoD with regards to monolithic hybrids that are currently MIL-PRF-38534 class H or K compliant.

Monolithic hybrids are monolithic microcircuits built by hybrid microcircuit manufacturers using their certified and qualified lines.  They are always documented by SMD’s (Standard Microcircuit Drawings).  They were allowed because organizations that built monolithic microcircuits according to MIL-I-38535 (now MIL-PRF-38535) had declined and adequate supplies were a concern.

Over time, the DoD expectations of these monolithic hybrid supplies have not been met.  For this reason, the DoD has determined that all future monolithic hybrid SMD’s will be issued using the requirements of MIL-PRF-38535, not the parameters of MIL-PRF-38534.

To follow up on the letter, you can expect that the wording of paragraph 3.9 of the MIL-PRF-38534 will be amended in the future.  This means that the document will no longer allow for the development of monolithic hybrids according to it’s requirements.

If you have questions, you can certainly get a copy of the letter as a starting point.  It’s available from Document Center Inc.  Contact our staff and mention this blog posting, and they will provide you with a copy at no charge.  Just send them an email at info@document-center.com.  If you are still unsure about how this change will impact your business, there is a point of contact for the MIL-PRF-38534, Mr. Greg Cecil.  Information on how to contact Mr. Cecil can also be provided by our staff.  Remember, Document Center Inc. has been supporting U.S. government contract manufacturers since 1982.  Make us your Standards Experts!

New MIL-PRF-38534 J Released – Hybrid Microcircuits

MIL-PRF-38534, “Hybrid Microcircuits, General Specification for,” has just been revised.  The new Revision J is available from Document Center Inc. in paper format, for pdf download, and as part of our multi-user Standards Online subscription service.  This document is one of the primary U.S. military publications for microcircuits and has been one of our best sellers on the topic for many years.  If you use this spec, you’ll need to comply with the changes in Revision J by September 9, 2015.

MIL-PRF-38534J was formerly called out as MIL-H-38534.  It was renumbered back in 1995 as a result of Mil Spec Reform.  The new Revision J is a total of 151 pages.  However, the main requirements account for the first 20 pages only.  The balance of the publication is a series of Appendices (A through G – but not including B which was discarded a while back) which provide the details of implementing the specification.  Since the previous Edition (Revision H) was only 139 pages, you can tell there have been some updates in this issue.  Appendix G has been completely re-written.  Other changes are marked with asterisks in the margins for your convenience.  As is usual, the document does warn you that the marking of the areas with updates are done as a convenience only and may not be complete.

As many of you know, the U.S. military is an active and major consumer of electronics.  This means that the contract requirements for microcircuits, components, and so on play an important role in the industry.  This publication gives device manufacturers the baseline requirements for the performance of not only hybrid microcircuits but also multi-chip modules (MCM) and similar devices.  You’ll use the document if you’d like to be (or want to continue to be) included as part of the QPL (Qualified Products List) program.

You’ll find information on 7 quality assurance classes (D, E, F, G, H, K and L) in MIL-PRF-38534.  There is a separate clause with the requirements for each.  There’s also a Table II with an implementation summary that you’ll find to be particularly helpful.  Designation formats for these devices is covered in depth, as is certification and marking.

Of course, the Appendices take up the bulk of the specification.  Here you’ll find guidance on your quality management program, generic performance requirements, generic design and construction criteria, and so on.  The interactive index at the end of the publication is still part of the document.

Now you’ll want to get a copy.  Consider purchasing your military specifications from Document Center Inc.  Why?  Our prices are lower than the other standards resellers.  You’ll get our superior notification service free with the purchase of all standards from Document Center.  This means that you won’t be caught without the latest edition of the document!  And we’ve been working with these specs and standards since 1982, so we understand how they are used.

You can order online at our webstore, www.document-center.com.  Or contact our staff by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com).  We’re a woman-owned small business, with a focus on standards and standards products to help you control and maintain your compliance information.  Make us your Standards Experts!

MIL-STD-883 H – The DoD’s top standard for Microcircuits — Plus a list of other relevant standards

MIL-STD-883 Revision H, entitled “Test Method Standard – Microcircuits,” is Document Center’s all-time best selling military standard.  It provides approximately 700 pages of tests for microelectronic devices suitable for use within Military and Aerospace electronic systems.  It includes basic environmental tests to determine resistance to deleterious effects of natural elements and conditions surrounding military and space operations; mechanical and electrical tests; and workmanship and training procedures.

Revision H was released on 2/26/2010 and compliance with the standard was required by 9/30/2010.  Usage of the standard is mandated as part of a contract with the U.S. government.

The document is intended to be used in conjunction with several other major military documents:
MIL-PRF-19500 – Semiconductor Devices, General Specification For.
MIL-PRF-38534 – Hybrid Microcircuits, General Specification For.
MIL-PRF-38535 – Integrated Circuits (Microcircuits) Manufacturing, General Specification For.
MIL-STD-1835 – Electronic Component Case Outlines.
MIL-HDBK-217 – Reliability Prediction of Electronic Equipment.
MIL-HDBK-505 – Definitions of Item Levels, Item Exchangeability, Models, and Related Terms.

There are also references to a number of industry standards that are basic to any standard library for electronic devices:

ISO 14644-1 – Cleanrooms and Associated Controlled Environments – Part 1: Classification of Air Cleanliness.
ISO 14644-2 – Cleanrooms and Associated Controlled Environments – Part 2: Specifications for Testing and Monitoring to Prove Continued Compliance with ISO 14644-1.
IPC-T-50 – Terms and Definitions for Interconnecting and Packaging Electronic Circuits.
ANSI/NCSL Z540.3 – Requirements for the Calibration of Measuring and Test Equipment, General Requirements
ANSI/J-STD-004 – Requirements for Soldering Fluxes
ANSI/J-STD-005 Requirements for Soldering Pastes
ANSI/J-STD-006 – Requirements for Electronic Grade Solder Alloys and Fluxed and Non-fluxed Solid Solders for Electronic Soldering Applications
IPC/EIA/JEDEC J-STD-002 Solderability Tests for Component Leads, Terminations, Lugs, Terminals and Wires.
EIA/JESD 22-B116 Wire Bond Shear Test
EIA/JESD 78 IC Latch-up Test.
EIA-557 Statistical Process Control Systems.
ASTM E263 – Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Iron.
ASTM E264 – Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel.
ASTM E265 – Standard Test Method for Measuring Reaction Rates and Fast-Neutron Fluences by Radioactivation of Sulfur-32.
ASTM E666 – Standard Practice for Calculating Absorbed Dose from Gamma or X-Radiation.
ASTM E668 – Standard Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose on Radiation Hardness Testing of Electronic Devices.
ASTM E720 – Standard Guide for Selection and Use of Neutron Sensors for Determining Neutron Spectra Employed in Radiation-Hardness Testing of Electronics.
ASTM E721 Standard Method for Determining Neutron Energy Spectra with Neutron-Activation Foils for Radiation-Hardness Testing of Electronics.
ASTM E722 – Standard Practice for Characterizing Neutron Energy Fluence Spectra in Terms of an equivalent Monoenergetic Neutron Fluence for Radiation-Hardness Testing of Electronics.
ASTM E801 Standard Practice for Controlling Quality of Radiological Examination of Electronic Devices.
ASTM E831 Standard Test Method for Linear Thermal Expansion of Solid Materials by Thermomechanical Analysis
ASTM E1249 – Minimizing Dosimetry Errors in Radiation Hardness Testing of Silicon Electronic Devices.
ASTM E1250 – Standard Method for Application of Ionization Chambers to Assess the Low Energy Gamma Component of Cobalt 60 Irradiators Used in Radiation Hardness Testing of Silicon Electronic Devices.
ASTM E1275 – Standard Practice for Use of a Radiochromic Film Dosimetry System.
ASTM F458 – Standard Practice for Nondestructive Pull Testing of Wire Bonds.
ASTM F459 – Standard Test Methods for Measuring Pull Strength of Microelectronic Wire Bonds.
ASTM F526 – Standard Test Method for Measuring Dose for Use in Linear Accelerator Pulsed Radiation Effects Tests.
ASTM F1892 – Standard Guide for Ionizing Radiation (Total Dose) Effects Testing of Semiconductor Devices.
ASTM C177 – Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded Hot-Plate Apparatus.
ASTM C518 – Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.
ASTM D150 – Standard Test Methods for A-C Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulating Materials.
ASTM D257 – Standard Test Methods for D-C Resistance or Conductance of Insulating Materials.
ASTM D1002 – Standard Test Method for Strength Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal).
ASTM D3850 – Standard Test Method for Rapid Thermal Degradation of Solid Electrical Insulating Materials By Thermogravimetric Method (TGA).

The MIL-STD-883, both the current Revision H and previous editions, as well as the other standards noted above, are all available from Document Center Inc.  Use our website, www.document-center.com, or phone (650-591-7600), fax (650-591-7617) or email us (info@document-center.com).  Any questions or comments you may have are welcome.