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2007-06-17 News Release
Vectra LCP perfect for
Spectrum Plastics
Vectra LCP gives molding application for auto sensor housing from Spectrum
Plastics needed precision and dimensional stability.
Vectra* liquid crystal polymer (LCP) from Ticona, the engineering polymers
business of Celanese Corporation, gives Spectrum Plastics, Ansonia, Conn.,
an operating unit of Barnes Group Inc., the precision molding and high
dimensional stability it needs when molding the open-cavity package for
a car-safety-system stability sensor.
Spectrum Plastics, the largest U.S. reel-to-reel molder and global supplier
of precision injection molded thermoplastic parts, provides design, tooling,
prototyping and full-scale production, produces multiple versions of open-cavity
packages ranging from 12 to 20 leads. This package, which measures 0.19
by 0.625 by 0.75 in. (5 by 16 by 19 mm), is designed to hold a microelectromechanical
system (MEMS) installed by the customer. Spectrum Plastics fabricates
the package using its proprietary reel-to-reel technology in which it
feeds a continuous strip of lead frames and overmolds them in a multi-station
molding line containing multi-cavity tools.
Polymer performance is critical for this safety system element, which
must remain sealed and perform reliably for the life of a car. Given this,
Spectrum Plastic’s customer selected Vectra LCP to gain micron-level
tolerances, the ability to minimize dimensional change in molding plastics,
and the thermal stability to withstand lead-free soldering to 280°C
or more. The LCP also helps make the plastics molding operation more efficient
because of its wide processing window for flow, temperature, injection
rate and other parameters, as well as good cycle time.
The high-volume molding for this MEMS product is done under 100,000 clean-room
conditions. In producing this part, Spectrum Plastics must meet a zero-defect
standard, as well as strict requirements for the housing, lead frame and
plating. It uses statistical process control to ensure the housing meets
micron tolerances. In addition, it performs a range of post-processing
inspections that involve testing for particle size and count, moisture
level, the absence of flow lines and voids, and lead frame integrity regarding
the wire bond and solderability.
* All registered trademarks are owned by Ticona or its affiliates.
Read a recent press release about - Advancement in expoxy
bonding allows liquid crystal polymers from Ticona to replace ceramics
and metals in air-cavity sensor packaging.
Plastics
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