Product category:
Electronics Manufacturing Materials and Consumables
News Release from: Henkel Loctite Adhesives | Subject: Loctite 3220, 3905, 3131 and 3217
Edited by the Electronicstalk Editorial
Team on 22 December 2006
Adhesives are made for mounting image
sensors
As the mobile handset image sensor market continues to expand at a rapid pace, new Loctite brand adhesive products meet the requirements of this significant high volume application.
As the mobile handset image sensor market continues to expand at a rapid pace, Henkel has released several new Loctite brand adhesive products to meet the requirements of this significant high volume application Henkel's family of image sensor housing adhesives now incorporates several new materials, including: Loctite 3220, Loctite 3905, Loctite 3131 and Loctite 3217
This article was originally published on Electronicstalk on 2 Oct 2002 at 8.00am (UK)
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All are designed for temperature sensitive components and are ideal for image sensor assembly, which continues to push the miniaturisation envelope.
With projections that nearly 50% of mobile phones produced will have one or more camera modules onboard, it is essential that image sensor housing assembly be conducive to high-volume mobile handset production.
The rapid cure times and long pot life characteristics of Henkel's new line of Loctite brand adhesives effectively enable high-UPH (units per hour) manufacturing.
Further reading
Moulding compound handles under-bonnet conditions
Hysol GR725-AG is a high-temperature semiconductor moulding compound ideally suited for under-bonnet automotive applications and capable of withstanding harsh environmental conditions.
Phase change material boosts thermal performance
Loctite PowerstrateXtreme is a reworkable phase-change thermal interface material ideally suited for use between a heatsink and a variety of heat dissipating components.
Sealant suits automotive modules
Loctite 5252 is a medium-viscosity, UV and moisture curing sealant for post-assembly use on electronic module enclosures.
In addition to their fast cycle time abilities, the new family of Loctite materials also delivers excellent bonding to a variety of surfaces that, historically, have posed bonding challenges.
These latest adhesive formulations bond well to nylon, liquid crystal polymer (LCP) and polycarbonate, which are the three housing materials most commonly used for image sensors.
For those manufacturers requiring a heat cure product, Loctite 3220 offers a material solution that delivers a 50% adhesion improvement over older-generation products.
It bonds well to all three common housing surfaces and can be cured at very low temperature for significant energy savings or snap cured to further increase production speeds.
Another heat cure product, Loctite 3905 is the latest adhesive advancement for firms that demand superior reliability through high adhesion strength and high glass transition temperature for thermal stability.
The material also possesses very fine dispense capabilities to meet the demands of smaller camera module bonding areas, which is a direct result of the push toward reduced footprints and increased pixel counts.
The second series of new adhesive products to become commercially available are two dual cure products, Loctite 3131 and Loctite 3217.
With a dual UV and heat cure, certain requirements of current processes can be eliminated and costs significantly reduced.
In a traditional housing assembly process, once the housing component is placed, a jig is used to hold the housing and the substrate to maintain the housing position and focus alignment.
The UV option delivered by the Loctite materials is used to temporarily fix the housing in its location, which prohibits movement during transport to the oven and the subsequent cure process and eliminates the need for a stability jig.
Plus, the materials are compatible with standard UV or blue light LEDs, which offer a much safer wavelength operation environment.
The adhesive is then heat cured at a very low temperature - as low as 60C.
Both Loctite 3131 and Loctite 3217 provide excellent adhesion to a variety of surfaces, the primary difference in the materials being their UV fixture strength and rheology.
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