AN4010 Datasheet, PDF (1/2 Pages) M/A-COM Technology Solutions, Inc. – Post-Processing Color Change of Rogers RO4000

Application Note
AN4010
Post-Processing Color Change of Rogers RO4000^®
Series Materials
Rev. V1
Introduction
M/A-COM Technology Solutions packages a variety of devices using substrates and lids composed of
RO4000^® Series high frequency circuit materials manufactured by Rogers Corporation. These materials are
glass reinforced hydrocarbon/ceramic laminates designed for performance sensitive applications.
This substrate material has several qualities desirable for RF microwave circuits, such as:
 Stable electrical properties over a broad frequency range
 Low dielectric loss
 Thermal coefficient of expansion (CTE) that allows for excellent dimensional stability
 Tg of > 280°C
For air cavity integrated circuit packages utilizing these substrates, the lids are also made of the same
R04000^® Series material. The lids are sealed to the substrate using an epoxy. Since the CTE’s of both the lid
and substrate are the same, the final completed package is extremely robust.
These packages are designed to withstand Pb-free assembly reflow conditions which are typically at a maximum
of 260°C. One of the characteristics of the R04000^® Series material is that it undergoes a slight color change
when exposed to temperatures above approximately 125°C.
This color change is normal and “cosmetic” only and has no impact on performance or reliability. Full reliability
and qualification testing was performed on these package materials. Following are the results:
Temperatures < approximately 125°C
Temperatures > approximately 125°C
1
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is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
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Visit www.macomtech.com for additional data sheets and product information.
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.