INTA Technologies Corporation 2281 Calle de Luna, Santa Clara, CA 95054 || Tel: 408-748-9955 || Fax: 408-727-3027

 

 

Aerospace & Defense

 

 

 

Table of Contents

 

 

 

What coatings are used for aerospace and defense applications?

Many types including:

Nickel

Silver
Copper

Gold

Platinum – high temp

Rhodium – high temp

 

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Does INTA currently work for aerospace and defense contractors and government organizations?

Yes, quite a few well known customers have been working with INTA Technologies for many years. One example is federal contract FA9451-08-D-0179. Boeing LTS is the prime contractor and INTA is providing contract services including gold plating and brazing. The overall project has received funding of $3.8 million and has a potential for $49 million. INTA recently added to capacity by installing a new and larger furnace and plans to keep the original furnaces in place and operating to meet demand.

 

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Is INTA RoHS compliant?

Yes.

 

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What about ITAR?

INTA fully complies with all ITAR regulations at all times.

 

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Does INTA plate cadmium?

No, no cadmium or chrome plating. We do have cadmium and chrome replacements. Ni-B for cad and Ni-P for chrome. If you need a referral to a company who plates CAD (cadmium), please contact Blake Kneedler, Manufacturing Engineer 408-748-9955 x113 or blake@intatech.com

 

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Does INTA offer chrome conversion or chrome plating?

No but we have a chrome substitute called Ni-P. Ni-P provides an extremely hard, durable and shiny metallic finish. Ni-P is not appropriate for materials with very low melting temperatures such as certain types of resins and plastics.

 

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What is a typical lead time?

Lead times vary. Depending on the complexity of the project the lead time may range from one day to 16 weeks. The typical plating lead time is one week. The typical metallized ceramic product lead time is longer, often several weeks.

 

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Does INTA have the capability to assemble packages?

Yes, please send the drawings to contact@intatech.com for review and feedback.

 

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What types of feedthrus does INTA offer?

Single pin

Multi-pin

Glass to metal

Ceramic to metal

Hermetic

Non-hermetic

Vacuum tight

 

There are some size limitations, INTA specializes in tiny, small and medium sized parts under 20”. Most of the feedthrus we make are much smaller, 1-2” dia and length.

 

We prefer the following materials:

Kovar

Al-O

Glass (Borosilicate and Alkali Barium Silicate)

Stainless steel

CuW

Molybdenum

Tungsten

 

Include INTA Technologies during the design phase to avoid DFM problems down the line. Send drawings and specifications to contact@intatech.com

 

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Does INTA meet industry standards and MIL and/or ASM and related specs?

Yes, INTA meets and exceeds a long list of MIL and related standards and specs. Many of the standards are listed on the website. For further clarification please contact INTA.

 

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How long has INTA Technologies been in business?

Since 1978.

 

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What about on-time delivery?

Our on-time delivery rate is over 95% or better. We track deliveries as part of our ISO 9001:2008 QMS. On-time delivery is a top priority for INTA Technologies.

 

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Does INTA Technologies offer thin films?

No, not in-house. INTA generally offers thick films for non-conductors (THK > one micron). For sputtering and vacuum deposit techniques, INTA outsources the business. Contact INTA Technologies for more information regarding thin films and/or a referral to a quality thin film service provider.

 

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Are there any materials INTA does not work with?

Due to environmental and RoHS concerns, INTA Technologies does not work with the following materials:

Lead

Mercury

Hexavalent chromium

Polybrominated diphenyl ether

Polybrominated biphenyl

Cadmium

 

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What materials are not RoHS compliant?

Please see the previous answer.

 

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What is C4ISR?

C4ISR stands for the following:

Command

Control

Communications

Computer

Intelligence

Surveillance

Reconnaissance

 

Modern C4ISR technology has improved field performance. INTA Technologies serves military, aerospace, government agencies, prime and sub-contractors and other customers striving to improve C4ISR technology through such advancements as:

Improved reliability

Reduced size

Reduced weight

Improved performance

Improved energy efficiency

Other

 

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What should I know about heat sinks?

Heat sinks are important components for many high temperature applications. For critical applications consider using CuW (copper tungsten). CuW has a very high rate of thermal conductivity (approx 150 W/mK). CuW is mainly tungsten, and can contain as low as 10% Cu. The grade of CuW is generally specified on the drawing (options include 75/25, 80/20, 85/15 and 90/10 W/Cu).

 

Tungsten has a very high melting point at approx 3422 degrees Celsius which makes it ideal when alloyed with copper for thermal management. The CuW should be coated, and is often attached to a ceramic using a gold alloy. In such a case, the CuW should be gold plated to aid the attachment/bonding. Some other popular heat sink materials are diamond, copper and aluminum. INTA does not sell diamond heat sinks but does offer CuW, copper and aluminum custom made-to-order heat sinks. INTA also offers plating services for heat sinks (nickel, gold, copper, silver, tin, other).

 

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What type of heat sinks are available?

INTA manufactures custom CuW, copper and aluminum heat sinks. INTA also offers nickel, gold, copper, silver, tin and other plating for heat sinks. For high temperature applications, CuW is ideal. Diamond is an excellent heat sink material but is not offered by INTA.

 

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Does INTA manufacture heat sinks?

Yes, INTA manufactures many types of heat sinks in our Santa Clara facilities. The Calle del Mundo facility handles the machining and the Calle de Luna facility handles much of the inspection, inventory and packaging. Most of our products are custom-made. To obtain pricing information, send project details and drawings to contact@intatech.com

 

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Does INTA assemble lead frames?

Yes, INTA assembles packages including lead frames and similar assemblies containing leads, heat sinks and ceramics. INTA also provides metallized ceramic, leads and heat sinks for the assemblies. INTA also assembles customer supplied material.

 

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What about RF packages?

INTA manufactures and sells custom RF packages.

 

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Does INTA sell BeO or AlN?

Yes, INTA sells both metallized and unmetallized BeO, AlN and many other types of ceramics and material.

 

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Does INTA offer silver plating to a MIL or similar spec?

Yes, these are some common specs INTA meets and/or exceeds:

 

AMS 2410 Silver Plating, Nickel Strike
QQ-S-365 Silver Plating (Electrodeposited)
ASTM B 700 Standard Specification for Electrodeposited Coatings of Silver for Engineering Use

 

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Does INTA offer AR or HR coatings?

No, not in-house but we can give a referral.

 

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What type of brazing does INTA perform?

Mainly furnace brazing in vacuum, air or hydrogen. We braze many types of material, especially metals, ceramic and glass. INTA offers hermetic brazing (a typical spec is 10^-9 cc/He per sec). Here is a list of popular braze/solder types offered at INTA:

 

ABA – active braze

CuSil – 28% copper 72% silver

Silver

Copper

AuSn – gold tin

 

Some other less-popular options include:

 

InCuSil – indium copper silver

AuSi – gold silicon

InAg – gold silver

BiSn – bismuth tin

InSn – indium tin

 

Our lowest temp solder option would be InSn 52/48 with a eutectic bond. The melting temperature of the alloy is approx 118. One of the higher temperature braze options would be copper with a melting point of 962 deg Celsius (approx). INTA does not offer any solder options containing lead or cadmium (such as SnPb, SnPbAg, InPb, SnPbCd or BiPb).

 

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What about target bonding?

INTA does not currently offer target bonding but can give a referral upon request.

 

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Does INTA offer DOD-P-15328?

No, this cleaning process is not offered by INTA Technologies Corporation although other rigorous cleaning specs are used.

 

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What is DOD-P-15328?

This is a coating specification which was more common many years ago. “Primer (Wash), Pretreatment (Formula 117 for Metals)” was originally written and adopted in the 1940s and is still used. The spec calls for a two-part primer which is very thin and contains a high level of isopropyl alchohol (over 6.5 pounds per gallon). To our knowledge, this process is not permitted in the State of California.

 

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Does INTA plate onto aluminum?

Yes, INTA commonly plates various metals such as nickel, copper, silver, gold or rhodium onto aluminum. INTA supplies aluminum parts built-to-order and also plates onto customer supplied components and materials.

 

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Does INTA offer MIL-C-5541 Class 1A or Class 3?

This is a conversion coating for critical applications which INTA does not currently offer in-house. If INTA works on projects needing this certification, the work is outsourced. The specification is entitled, “Chemical Conversion Coatings on Aluminum and Aluminum Alloys.” Class 1A requires the conversion coating to contain hexavalent chrome.

 

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Does INTA offer MIL-P-23377?

No, INTA does not offer this process.

 

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What is MIL-P-23377?

“Epoxy Coating, High Solids” (MIL-P-23377) is an Air Force specification which calls for a strontium chromate epoxy primer.

 

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Does INTA offer MIL-C-83286?

No, INTA does not offer a process that meets that particular military specification.

 

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What is MIL-P-83286?

“Coating, Urethane, Aliphatic Isocyanate, for Aerospace Applications” is the title of the specification. The spec is useful for polyurethane topcoat processes.

 

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Does INTA offer MIL-P-53022?

No, not in-house.

 

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What is MIL-P-53022?

“Primer, Epoxy Coating, Corrosion Inhibiting, Lead and Chromate Free” (MIL-P-53022) is a US Army requirement for certain epoxy primers used on exterior surfaces.

 

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What about MIL-C-53039 and/or MIL-DTL-64159?

No, INTA does not offer “Coating, Aliphatic Polyurethane, Single Component, Chemical Agent Resistant” (MIL-C-53039) or “Coating, Water Dispersable Aliphatic Polyurethane, Chemical Agent Resistant” (MIL-DTL-64159) approved processes in-house. INTA focuses on eless and electrolytic plating, cleaning, coatings, metallizing, CuW, machining, testing, brazing, joining and assembly. Coatings are typically deposited on components and/or assemblies by INTA not large items such as airplanes or buildings.

 

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Does INTA offer gold plated wire?

Yes, INTA sells gold plated wire for medium and large volume orders only. Restrictions apply, contact INTA Technologies Corp. for further details contact@intatech.com

 

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Are there any good references for aerospace and defense technical information and news?

One valuable resource available is an interesting and informative publication by the name of Military & Aerospace Electronics. The periodical is published by PennWell. Free subscriptions are offered to qualified parties. The articles mainly relate to application notes and industry news.

 

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Last revised: 16 JUL 2010