 |
2007-06-16 News Release
RJR Polymers Epoxy Technology
in Electronic Packaging
Advancement in expoxy bonding allows liquid crystal polymers from Ticona
to replace ceramics and metals in air-cavity sensor packaging.
RJR Polymers, Inc., Oakland, Calif., that furnishes custom package, adhesive
and sealing technologies for the manufacture of air-cavity packages, has
developed a series of proprietary epoxies that are the first to work across
a wide variety of liquid crystal polymer (LCP) grades for use in fabricating
air-cavity packaging for sensors and other electronics. This bonding technology
allows packaging made of Vectra* LCP from Ticona, the engineering polymers
business of Celanese Corporation, to replace packaging made of ceramic
and metal. The LCP packaging provides for improved designs and significant
cost savings.
LCP air-cavity packaging is a containment system that protects sensors,
microelectromechanical systems (MEMS), integrated circuits and other elements
from environmental and mechanical influences. Such packaging, which is
typically less than 38 mm long and 38 mm wide, usually involves a housing,
a lid and a lead frame encapsulated in the housing. Sensor applications
for RJR air-cavity packages include automotive pressure, temperature and
fuel sensors, medical diagnostics, cell phone base stations, wireless
networks, radios and optical systems (including communications and cameras).
|
RJR Polymers bonds Vectra
liquid crystal polymer and metal to form quad flat panels
for surface mounting. Click
Here for High resolution image. photo: Ticona |
|
RJR - Quad Panels shown at right:
RJR Polymers bonds Vectra liquid crystal polymer and metal to form quad
flat panels for surface mounting (the largest ones shown are 1.25 in.
square). These panels are often used as a base for sensors, such as MEMS-based
accelerometers and tire press sensors.
“We chose Vectra LCP because it gives our sensor packages the many
properties they need,” says Dick Ross, RJR president and CTO. “It
allows them to meet demanding thermal specifications for reflow soldering
(to 280°C) and repeated thermal cycling from -65°C to +150°C.
It also has excellent resistance to water vapor, high dimensional stability,
and the ability to form extremely thin yet strong walls, among other performance
properties. The challenge in using LCP is to process and adhere it properly.”
RJR offers a systems approach to LCP packaging that includes custom epoxy
formulations and manufacture, molding LCP packaging elements, applying
epoxy to the package, and providing equipment to customers to seal packages.
RJR specializes in B-staging, in which epoxy is pre-applied to parts.
Customers then reheat the parts so the epoxy flows and the parts can be
joined to other components.
|
RJR Polymers bonds Vectra
liquid crystal polymer and metal to form a multi-lead,
fiber-optic packages. Click
Here for High resolution image. photo: Ticona |
|
RJR – Fiber Optic Package shown at right:
RJR Polymers bonds Vectra liquid crystal polymer and metal to form a multi-lead,
fiber-optic packages. (The one shown is 2 in. long and 0.6 in. wide).
The fiber enters at end clear of leads and information from it is distributed
to various leads. This package is typical of one used in autos to turn
headlights on and off automatically.
“We find that LCP air-cavity packages equal or exceed the performance
and reliability of ceramic packages,” said Ross. “This polymer
also helps us speed prototype design, lower tooling costs and create new
design options and far greater flexibility when compared to ceramic packaging.
“Dimensional uniformity is a problem with ceramic packaging because
of its high shrinkage during manufacture. As a result, designers tend
to favor two-dimensional (X, Y) ceramic shapes. Vectra LCP allows us to
create 3-D packaging having rounded contours and complex features, so
we can make more sophisticated and efficient products.”
RJR’s LCP molding operation uses a patented method to seal leads
from the lead frame as they pass through the package sidewall. This involves
placing a small amount of epoxy on the frame during molding to form a
strong metal-to-plastic bond.
* Vectra is a registered trademark of Ticona, the engineering polymers
business of Celanese Corporation.
Read a recent press release about - Solvay collaborates with Thin Film
to develop functional polymers for the new emerging printed
electronics applications industry.
Packaging
Engineer Jobs - Post Employment Opportunity!
Click
here to view more news headlines.
E-mail this page to a friend 
|
|
 
News / Resources
- GE Plastics solutions
for Medical Devices
- Certification, Training and Courses
from The American Management Association
- Small Quantity Specailist
- Plastics, Metals, Tool Steel and ...
-
Looking for a Study Program?
- All this Months News
- Changing Jobs? View a Wide
Range of Real Estate Nationwide
- 2007 Ad-Aware release - anti-spyware
protection
- Golf
Equipment Manufacturer -Buy Direct and Save!
Copyright - Unless
otherwise stated all
contents of this web site are © 1998/2007 JOBWERX.COM.
– All Rights Reserved. For permission to reproduce any contents of this
web site, please advise our Syndication department: Log onto HELP
|
