1、MIL-F-4B370A 13 77797Ob 0317471 b E Beneficial comments (recommendstions, additions, deletions) and any perfimnt data which may be of use in improving this document should be addressed to? Commander, us Army Armament Research and Development Center, Attn: AMSMC-QA, Dover, NOW Jersey 07801-5001 ty um
2、ng the self-addressed Standardization Document Improvemmt MIL-F-4837OA (AR) 1 July 1985 SUPERSEDING MIL-F-48370 (AR) 18 January 1977 MILITARY SPECIFICATION FUZE M934E6, HYBRID MICROCIRCUITS FOR This specification is approved for use by US Army Armament, Munitions and Chemical Command, and is availab
3、le for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the performance, test, manufacture and acceptance requirements for hybrid micro- circuits, hereinafter to be called hybrids, to be used in the M934E6 Stinger fuze. 2. APPLICABL
4、E DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the following specifications and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation, form a part of
5、 this specification to the extent specified herein. SPECIFICATIONS MIL I TARY MIL-1-23011 - Iron-Nickel Alloys for Sealing to Glasses MIL-C-26074 - Coating, Electroless Nickel, Requirements MIL-M-38510 - Microcircuits, General Specifications for MIL-A-48078 - Ammunition, Standard Quality Assurance -
6、. Provisions, General Specifications for . MXL-M-55565 - Microcircuits, Preparation for Delivery of and Ceramics for ! THIS DOCUMENT CONTAINS “ PAGES FSC 1336 DISTRIbTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking p
7、ermitted without license from IHS-,-,-FEDERAL MIL-F-48370A 23 777770b 0327472 MIL-F-48370A (AR) QQ-C-766 . - Steel Plates, Sheets, and Strip-Corrosion Res is ting STANDARDS MILITARY MIL-STD-202 - Test Methods for Electronic and MIL-STD-883 - Test Methods and Procedures for Electrical Component Parts
8、 Microelectronics 2.1.2 Other Government documents, drawinqs, and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. DRAWINGS US ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER (ARDC) 9297034 - Microcircu
9、it, Digital - Firing Circuit 9297063 - Microcircuit, Digital - Safing and Arming (Copies of specifications, standards, drawings, nd publications required by manufacturers in connection with specific acquisition functions should be obtained from the procuring activity or as directed by the Contractin
10、g Officer.) 2.1.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of the specification shall take precedence. 3. REQUIREMENTS 3.1 Materials. 3.1.1 Parts, materials and processes. Parts, materials and processes shall be
11、in accordance with the applicable drawings, - specifications and standards. resistant or shall be plated or treated to resist corrosion. 3.1.2 Metals. External metal surfaces shall be corrosion 2 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-
12、F-LlB370A 13 m 777770b 0337Ll73 T MIL-F-483 70A (AR) 3.1.3 Other materials. External parts, elements or coatings including markings shall be inherently non-nutrient to fungus and shall not blister, crack, outgas, soften flow or exhibit defects that adversely affect storage, operation or environmenta
13、l capabilities of hybrids. conform to one of the following: Class 1, with a Rockwell B hardness of 70 typical and a grain size of ASTM 6 2 1. The KOVAR shall be plated with 150 50 micro- inches of electroless nickel per MIL-C-26074, Class 1. 3.1.4 Case material and finish. The case material shall a.
14、 Iron, Nickel, Cobalt alloy (KOVAR) per MIL-1-23011, b. Steel, Corrosion Resisting (Stainless steel) per Specification QQ-S-766, Class 304. 3.1.5 Lead material and finish. The lead material shall consist of Iron, Nickel, Cobalt alloy (KOVAR) per MIL-1-23011, Class I, with a Rockwell B hardness of 70
15、 typical and a grain size of ASTM 6 2 1. The external lead finish shall conform to one of the following: a. Hot solder dip. The hot solder dip shall be homoaeneous with a minimum thickness at the crest of the major flats of 200 microinches of solder (SN60 or SN63) over the primary finishes in accord
16、ance with (b) or (c) below or over nickel plate with a plating thickness of 100 microinches minimum and 200 microinches maximum. b. Bright acid tin plate. Thickness of 100 microinches c. Gold plate. Gold plating shall be a minimum of 99.7 percent gold (0.3 percent maximum for all impurities and othe
17、r metals combined). Gold plating shall be a minimum of 50 micro- inches and a maximum of 225 microinches thick. minimum and 400 microinches maximum. d. Other finish. Any finish which meets the solderability requirements of MIL-STD-883, Method 2003 and has been approved by the procuring activity. 3 P
18、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-48370A FAR) 3.1.6 Internal lead finish. The finish for the portion of the lead.interna1 to the hybr.id shall be compatible with the type of mire and the bond.ing method u sed. 3.2 Desiqn and constr
19、uction. Hybr.id design and construction .shall be .in accordance w.ith the requirements specif.ied here.in and - - :.in the applicable draw.ings. 3.2.1 Package. All hybrids shall be hermetically sealed in glass, metal or ceramic (or combinations of .the.se) packages. No organic or polymeric material
20、s (lacquers,- varnishes, coatings, adhesives, greases, etc.) -shall be u,sed .inside the hybrid package. 3.2.2 De.siqn documentation. When spec.ified in the procurement document, the topography. for all hybrids shall be submitted to the procuring activity. Design documentation shall be traceable to
21、the specific part, drawing or type numbers to which it applies, and to the production lat(s) and inspection lot codes under which hybr.ids are manufactured and tested so that .revisions can be. identified. 3.2.3 Internal conductors. Internal conductors (me ta 11 i z abion s t r ipes , con tact areas
22、, bonding in te r faces, wires or other current carrying elements) of the hybrids shall be designed so that no properly fabricated conductor shall experience, .in normal operation, a current density in excess of 2 x 10E5 ampere.s/square centimeter, including allowances for normal production- toleran
23、ces on design dimensions, and actual thicknesses at critical areas such 8s steps in elevation or contact windows. 3.2.4 Presea1 bake. The hybrids shall be baked at 15OoC in a dry nitrogen atmosphere for twenty four hours minimum immediately prior to sealing. 3.2.5 Test data and sample parts. Te.st d
24、ata and sample parts ,shall be submitted as specified. in the procurement document. 3.3 Performance characteristics. 3.3.1 High temperature storage. Hybrids, after being subjected to high temperature storage per MIL-STD-883, Method - 1008, 15O0C temperatuie for 1000 hours duration, shall meet the fi
25、nal electrical requirements of .the detailed drawing. 3.3.2 Temperature cyclinq. Hybrid.s, after being subjected to temperature cycling a.s specif.ied.in MIL-STD-883, Method 1010, Test Condition C and cycling between step.s 1 and 3, shall meet the final electrical requirements of the detailed drawin
26、g. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-g370A 13 W 7777906 0319L175 3 W MIL-F- 48 37 OA (AR) 3.3.3 Solderability. Hybrids shall meet the solderability 3.3.4 Seal. 3.3.4.1 Fluorocarbon qross leak. Hybrid.s shall meet the requirement
27、s specified in MIL-STD-883, Method 2003. requirements specified in MIL-STD-883, Method 1014, Test Condition C. 3.3.4.2 Tracer qas (HE) fine leak. Hybrid.s shall meet the reauirements specif.ied. in MIL-STD-883, Method 1014, Test Condition 3.3.5 Thermal shock. Hybrid-s, after being subjected to therm
28、al shock as specified in MIL-STD-883, Method 1011, Test Condit ion A, shall meet the final electrical requirements of the detailed drawing. 3.3.6 Mechan ical shock . Hybr.ids, after being subjected to mechanical shock as specified .in MIL-STD-883, Method 2002, .subject to limits of detailed drawing
29、shall meet the final electrical requirements specified therein. as specified in MIL-STD-883, Method 2007, Test Condition A, .shall meet the final electrical requirements of the detaIled drawing. 3.3.7 Vibration. Hybrids, after being subjected to vibration 3.3.8 Lead inteqrity. Hybr.ids shall meet th
30、e requirements of MIL-STD-883, Method 2004, Test Condition B1. 3.3.9 Bond strength . Hybrid wirebonds, when tested as specified. in MIL-STD-883, Method 2011, Test Condition D, shall exh.ibit a minimum bond strength as follows: WIRE MATERIAL WIRE DIAMETER MINIMUM BOND STRENGTH Au Au Al Al Al Al Al Al
31、 Al 1 mil 2 mil 1.25 mil 2 mil 3 mil 4 mil 5 mil 8 mil 10 mil 3 grams 6 grams 2 grams 3.8 grams 8 grams 14 grams 22 grams 54 grams 80 grams 3.3.10 Burn-in. Hybrids after being subjected to burn-in in accordance with the detailed drawing and MIL-STD-883, Method 1015, Test Condition D, for 160 hours a
32、t +125C minimum, shall meet the final electrica-1 requirements of the detailed drawing. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-48370A 13 777770b 03L797b 5 MIL-F-48370A (A) 3.3.11 Stabilization bake. Sealed hybrid.s, after being subje
33、cted to Stabilization Bake shall meet the final electrical .requirements of .the detailed drawing. of MIL-STD-883, Method 2017. 3.3.12 Internal visual. Hybrid,s shall meet the requirements 3.3.13 External v.isua1. Hybrids shall meet the requirements of MIL-STD-883, Method 2009. 3.3.14 Constant accel
34、eration. Hybrid.s, when tested .in accordance mith MIL-STD-883, Method 2001, Test Condition A, Y1 axis, shall meet the final electrical requirements of the detailed drawing . .requirements of the detailed drawing. -requirements of the detailed drawing. 3.3.15 End point electrical. Hybrids shall meet
35、 the 3.3.16 F.inal electrical. Hybr.ids shall meet the electrical 3.3.17 Internal visual (Post Stress). Hybr.ids shall meet the requirements of 4.5.3. 3.4 Markinq. Marking shall be .in accordance with the detailed drawing and shall include as a minimum the following: a. Index point b. Procur.ing act
36、iv.ity part number c. Lot number and date (month and year) d. Ser.ia1 number e. Code identificabion number 3.4.1 Markinq location. The Lot Number and Date, Serial Number and procuring activity part number shall be marked on the .frontside as a minimum. The code .identification number may be marked o
37、n the front or backside. The index point shall be marked as specified in the detailed drawing. 3.4.2 Markinq permanency and 1eqib.flity. Marking shall be correct, permanent, legible and capable of withstanding the requirements of MIL-STD-202, Method 215. shall be accomplished in accordance with proc
38、edures and safeguards of MIL-M-38510 and available for review by the 3.5 Rework prov.isions. All rework permitted on hybrids 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-98370A 33 W 7777706 0337477 7 *= MIL-F-48370A (AR) procuring actixity
39、. Rework of .the package seal-.for hybr.ids .shall be permitted a maximum of two times after final seal and only for packages wh.ich have an outer .seal perimeter of at least three . inches in total length. Allowable rework of sealed hybr.id.s shall be -limited to 1reclean.ing of any hybrid or porti
40、on thereof, restamping to correct defective marking, and lead straightening (provided the .reworked hybrids meet the .requirements of ,“lead integrity“). 3.5.1 In-process rework. 3.5.1.1 Substrate rework. a. One scratched, open or discontinous metallization path or conductor pattern may be repaired
41、by bridg.ing with a minimum of two bonding wires having equivalent current carrying capacity. b. Metallization path.s containing v0id.s may be repaired as ,in a. above or, where approved by the procuring activity, by an epoxy void-repair procedure. 3.5.1.2 Rebond.inq and element .replacement. a. The
42、 total number of wire rebond attempts shall be limited to a maxiinum of 10 percent of the totl number (or the nearest whole number) of bonds in the hybr.ids. A bond shall be defined as a wire to post or w.ire to pad bond (i.e., .for a 14 lead wire-bonded package there are 28 b0nd.s). Bond-Offs requi
43、red to clear the bonder after an unsuccessful first bond attempt need not be considered as rebonds provided they can beidentified as bond-Offs by being made physically off the plated post or if they contain a non-typical number of bond.ing tool marks. The initial bond attempt need not be visible. Th
44、e replacement of one wire bonded at one end shall be considered as one rebond; a replacement of a wire bonded at both end.s, or an unsuccessful bond attempt of a wire already bonded at the other end shall be considered as two rebonds, Compounding bonding. is not permissible. b. A maximum of two repl
45、acements of each element or die shall be permit-ted, except that there shall be no more -than 20% replacement of the total elements or dice. Within the 20% replacement allowance, replacement of active dev.ices follow.ing electrical testing, as defined. in detaTled drawing, shall be limited to 10% of
46、 total elements or dice. . c. No more than one rebond attempt shall be permitted at any pad, and no rebonds shall be made directly over an area where metallization of intended w.ire bond areas has been Lifted. - - 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
47、 from IHS-,-,-_ MI.L-F-Ll8370A 13 7777706 0317478 7 0 MIL-F-4837OA (AR) d. A hybrid may be subjected to a maximum total of four interconnect bonding or element replacement cycles following completion of the first electrical test as defined by the detail drawing (i.e. after completion of the first el
48、ectrical test cycle, the hybrid cannot be subjected to more than four rework/repair cycles). Rebonding to substrate pad or package post when performed to effect element replacement shall not be counted against the total rebond limitations. Element removal will not be performed using techniques which
49、 expose other dice to temperatures in excess of 15OoC. 3.5.2 Deliddinq and rework of sealed hybrids. Delidding and rework of sealed hybrids shall be permitted with the following limitations: a. Delidding, rework and reseal of a hybrid shall be permitted a maximum of one time following initial package seal. b. Rework of a sealed hybrid may be accomplished at any point in the normal manufacturing process flow prior to the Qualit
