Product details

Kovar / Invar Chemical Etching

Julid Technology offers top of the line chemical etching of both Kovar and Invar. We boast years of experience in etching both alloys, and our products are currently in commercial production. In spite of Kovar and Invar being more difficult to etch than other metals such as stainless steel, our expertise allows us to maintain the same quality in our Kovar and Invar etching that we have with our stainless steel etching.

Invar Chemical Etching

Invar is a Nickel-Steel alloy that is used for its low coefficient of thermal expansion. The name Invar is derived from the word invariable, which refers to the material’s lack of expansion or contraction with temperature changes. Etched Invar parts are used by the electronic and telecommunication/microwave industries. Invar etching is commonly used to produce shims, shadow masks and microwave components.

Invar Material Composition (Main Elements):

Typical Grades:

·                       ASTM F1684

Common Uses:

·                       Shims

·                       Masks

·                       Microwave Components

Advantages:

·                       Low Thermal Expansion

Kovar is a Nickel-Cobalt-Iron alloy that has compatible thermal expansion characteristics to Borosilicate Glass. This property allows Kovar to maintain a mechanical connection to the glass over a range of temperatures. Etched Kovar parts are commonly used for step lids, carriers, covers and electronic shims.

Julid is familiar with a large range of thicknesses when it comes to etching Kovar. We routinely etch Kovar at five thousandths of an inch, and can go as low as one thousandth of and inch and as high as forty thousandths of an inch. When it comes to photo-chemically machining and marking Kovar, chemical etching is a great manufacturing option because it is cost effective and leaves no damage to the remaining alloy, such as heat-affected zones or burrs.

Julid also carries a wide range of Kovar in stock, so if you have a project in mind, we can produce it with a quick turnaround. The Kovar we carry is DFARS compliant and our company is ITAR registered and compliant, so those in the aerospace and defense industries can feel secure when contracting us with an assignment.

Kovar Material Composition (Main Elements):

Typical Grades:

·                       ASTM F-15

Common Uses:

·                       Step Lids

·                       Carriers

·                       Covers

·                       Electronic Shims

Advantages:

Compatible thermal expansion characteristics to:

·                       Borosilicate Glass

·                       Glass

·                       Ceramic Sealing Alloy

Alloy 42

Alloy 42 is a Nickel-Steel alloy that has a coefficient of thermal expansion that matches Silicon. Because of this property, etched Alloy 42 components are commonly used by the electronics industry. Alloy 42 etching produces parts are used for lead frames and electronic components.

Alloy 42 Material Composition (Main Elements):

Typical Grades:

·                       ASTM F-30

Common Uses:

·                       Lead Frames

·                       Electronic Components

Advantages:

·                       Coefficient of Thermal Expansion that Matches Silicon

 Please note that the above figures are given as a guideline. Should your component design fall outside these parameters please talk to one of our Technical Sales team who will be happy to talk through you requirement. Email: yw1@zldsmt.com

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