How to reduce thermal resistance of electronice contact surface

I have read some books about how to reduce thermal resistance of electronice contact surface. So there are many people a talk about this.

As we all know, most designers will position thermal interface materials in electronic assemblies by dispensing cure-in-place gap fillers as automotive electronics, telecom equipment, low-energy lighting, and other sectors demand higher production throughput, thinner bondlines, and reduced mechanical pressure on components and solder joints. As technology continues to advance, the trend toward designing smaller products with higher performance capabilities is requiring many to innovate and think of new ways of managing heat in more efficient ways. Proper thermal management is crucial to increasing or maintaining a product’s overall lifespan. This trend will drive changes in the characteristics and handling of thermal materials, as well as in the assembly processes and equipment used on the factory floor.
Thermally efficient pads and fillers have become vital in meeting demands to increase the performance and reduce the size of electronic assemblies, such as power supplies and control units, without compromising reliability. Today’s thermal materials are typically ceramic-filled silicone elastomers, which are easy to handle. They also conform well to the shape and surface texture of heatsinks or electronic components. And, they have high thermal conductivity relative to the still air they’re designed to eliminate.

Thermal Interface Effectiveness Measurement Configuration

What about pre-formed thermal gap pads

Pre-formed thermal gap pads in standard or custom shapes, sizes, and thickness have at least one major attraction—they’re extremely easy to use compared to older material types such as thermal greases. The Greases are difficult to use and imprecise, so they aren’t desirable in the modern production environment. However, a growing need is emerging for thermal materials that can be formed in place.

As a further advantage of cure-in-place interface materials, any design changes that alter the position or types of components used can be accommodated quickly by changing the shape and volume of thermal material deposited. If automatic dispensing equipment  is used, it can be reprogrammed, avoiding any need to reorder gap-filler pads in different sizes or shapes.
AOK has successfully developed multiple types of non-corrosive, temperature-stable, thermally conductive dispensable gap filler solutions. These include two-part materials that are designed to be mixed together when dispensed and to wet out to the adjacent surfaces filling even the smallest air gaps and voids. AOK technical service staff can help engineers determine the appropriate materials for their application and heat transfer requirements.

3M Thermal Pad vs AOK Brand Thermal Pad

3M thermal transfer pads are soft and conformable to provide maximum wet out for effective heat transfer and vibration damping for your most demanding thermal applications, such as LED and consumer electronic device assembly.

3M acrylic thermal gap pads have a unique surface tack that enables pre-positioning in multi-layer lamination applications.

Available in silicone and acrylic formulations, both thermal gap fillers provide excellent handling capabilities and can be die cut to fit most applications.

Thermal Pad Features - HIGH PERFORMANCE AOK^TM THERMAL INTERFACE MATERIALS

Soft with high compressibility to reduce thermal resistance and enhance thermal conductivity Optional thermal conductivities for your cooling applications. Naturally sticky Cost effective solutions with competitive price. Thermally conductive silicone rubber heat transfer pads and gaskets from gap filling compounds.

Thermal Pad Applications

- Between electronic components such as semiconductor, IC, CPU.MOS and heatsink.
- Led Lighting, LCD TV, Telecom device, wireless Hub,NB, PC, power supply etc
- Cooling Module, Thermal Module, in all applications where a metal housing is used as heatsink.

Thermal Interface Materials -Thermal Greases/ Thermal Gap Fillers

Thermal Interface Materials for Power LED heatsink

Thermal Greases is a traditional TIM material:

 Silicone-based paste format with a variety of fillers
 Typically applied in manual application or semi-automated process
 High-volume screen printing applications
• Typically viewed as lowest-cost TIM material of any kind.
• Referred to generally as “thermal paste”, “thermal compound”, “thermal grease”.
• User costing typically does not account for waste, clean-up, labor cost for
Application:
 Low material cost does not accurately describe total applied cost.
 Makes accurate cost comparisons to alternative TIM materials difficult.
 Bond line thickness generally predominates in thermal impedance performance, not filler material conductivity.
 Filler particle size is generally more critical than filler conductivity.
 High thermal conductivity fillers may result in higher thermal impedance, not lower.
 Development of a material with greatest ease of application may outweigh thermal impedance performance as the primary development target for many TIM2 applications.

Thermal Gap Fillers General statements: 

 Purpose of these materials is to fill a large air gap between a heat source and a convenient metal surface
 Relative high thickness precludes high performance relative to phase-change, thermal greases, LMAs, PSHs:
• Many materials available with modest thermal performance.
• Compressibility is an important determinant in material selection for a given
application
• Surfaces of gap-fillers may be tacky, to reduce interfacial resistance.
• Protection of surfaces with release liners prior to application is important to prevent dust, particulate accumulation.
• Application requirements are specific to individual material types.
• Very common for power LED applications:
 Luminaire lighting fixtures: heat transfer from LED baseplate to luminaire “can” for heat transfer to ambient air
 Very commonly used as TIM2 for projector light sources and other power LED
applications.

Compressibility is a key characteristic of Thermal gap-filler:

 Ability to deflect at low pressures
 Minimum pressure is important
 Relative high thermal conductivity is important because of the relatively thick nature
of a gap-filler
 Young’s Modulus of material is strongly affected by use of a high percentage of the high
thermal conductivity filler constituent.

helpful guidance and money-saving ideas for book printing

Print materials are laminated to increase longevity. In most cases, lamination is applied to printing that will be subject to stains, smudges, moisture, oil, grime, wrinkles, tears or anything else that might shorten its life.The lamination applied to printing is a clear plastic film, with either a gloss or matte finish. It can be applied to the face only, or it can be applied to both sides of the printed piece. Since the primary goal of lamination is protection, our experience has shown that the vast majority of laminated pieces have the plastic film applied to both sides.

What is a Sealed Edge?

A Sealed Edge is created when a printed piece is sandwiched between two pieces of plastic laminate film that extend past the edge of the printed piece. This allows the two sheets of film to bond to each other around the entire perimeter, thus totally encapsulating the printed document in plastic.

A Sealed Edge provides the ultimate protection against contaminants and is used when the printing may be subject to frequent handling or used in a harsh environment. The overhang lip created by the Sealed Edge method is usually in the range of 1/8"-1/2" to produce a strong bond and ensure that fluids and dirt never contact the edge of the printed paper substrate. Common uses for Sealed Edge lamination include restaurant and bar menus, factory signage, machinery hang tags, identification cards and educational material.

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Custom labels printing are one of the most diverse printed products available

Custom labels printing are one of the most diverse printed products available. They can be created in virtually any size, shape or color, and can be constructed using a variety of materials, adhesives and coatings. Sometimes referred to as stickers, decals or adhesive tags, labels are primarily used to communicate important information. Printed labels can provide identification, assist with distribution, give instructions, issue warnings, display promotional messages or serve a variety of other important purposes. Here at Image Printing Packaging we have several options Custom Label Design Options to Suit Your Needs.

Custom Label Design Options to Suit Your Needs

Image Printing Packaging has many design templates to help get you started. Order custom stickers with our design templates and customize your custom stickers with text and upload your logo or graphics. If you already have your personalized stickers designed, you can simply upload your file for us to print!
Custom Label Printing for Your Small Business
Our proprietary technology means that we can print your custom stickers in small quantities and still offer you the best value anywhere. Historically, labels printing and design have been a hands-on, laborious process for both the supplier and the customer. Vistaprint has not only fully automated the manufacturing of labels printing, but also the manner in which orders are created and submitted. We incur lower costs, which means our customers enjoy lower prices for higher quality personalized sticker printing.

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Image Printing is a leading catalog printing company

Increase sales by giving your customers all the facts on your products through the crisp images and detailed descriptions of high quality, custom catalog printing. At Image Printing, They offer wholesale catalog printing with a variety of print, color and book binding options, including Saddle-Stitched (Stapled), Wire-O, Plastic coil and Perfect Bound. Our wholesale catalog printing process makes it easy to price, order and ship bulk catalogs—even on a tight schedule—while our modern printing techniques and variety of options ensure the final product will satisfy even the most demanding customer. Plus, custom catalog printing is never saddled with extra fees. Wholesale Catalog Printing Regardless of order size, the professionals at Image Printing take extra time to ensure every detail of your wholesale catalog printing order is attended to. It is this rarely seen level of customer service that has made us the leaders in the wholesale catalog printing industry for decades and earned us more than 375 PIAG awards.

Image Printing is a leading catalog printing company offering 8.5 x 11 short run digital and offset catalog printing and mailing in full color and black and white. Binding options are saddle-stitched, spiral bound and wire-o bound with the options of UV coating for covers, variable data, QR Codes and # 9 remittance envelope inserting. We also offer Templates, Ideas, Details, Videos and Case Studies for advertising catalogs, education-schools-academies-charter schools-private-catholic-fraternities-college catalogs, clothing catalogs, equipment catalogs, food & beverage catalogs, outfitters hunting catalogs, product catalogs, sporting events and sports marketing catalogs and many more. 
Image Printing specialize in short run catalog printing, fast service for small quantities from 10 to 3, 000 full color or black and white catalogs. 
Order your catalog printing online fast! Get great prices and great quality catalogs now. Request a sample packet to see our catalog printing quality first hand. 

• Sizes: 8.5 x 11, 8.5 x 5.5, 4.25 x 11 and 6 x 9
• Saddle-Stitched, Wire-o and Spiral Binding
• 8-64 pages (call, chat or submit a custom quote for pricing on more pages and different sizes).Product List

 
• Large selection of papers to choose from.
• Our printing company offers offset and digital, color and/or black and white printed catalogs..
• Add Direct Mailing Services and we’ll save you time and money by addressing and mailing your  printed catalogs.
• Personalize and customize your short run digital catalog printing by adding Variable Data.
• 2-5 Business Day Turnaround Options
•  Add QR codes to your catalog free with printingcenterusa.com
• Free Catalog Templates, Ideas, Details, Videos
• We print 6 x9  and 9 x12 Catalog Envelopes
• UV coating available on Cover Weight Covers
• Free Electronic Proof
• 100% Satisfaction Guarantee
• Get Quote and Order NOW!

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