SMT, PCB, EMS Technical Articles

The Thermal Side of 64-Bit Processing

May 06, 1999 | Christopher Chapman, Aavid Thermal Products, Inc.

The newest workstations and servers, targeting computationally-intensive applications and large-scale database management, use 64-bit microprocessors and provide the next generation of computing power. ...

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Thermal Management of Electrolytic Capacitors

May 06, 1999 | Christopher Soule, Aavid Thermal Products, Inc.

Input voltage capacitors are typically the parts that fail first in a high power circuit. Today's requirements for increasingly smaller packages is driving high component densities in power systems, as in all systems. As the package size... ...

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Thermal Engineering Overview.

May 06, 1999 | Craig Johnston, Gary Kuzmin, Aavid Engineering, Inc.

The present problem with cooling microprocessors is a relatively new issue -- about 4 years old. It stems from the collision of two conflicting trends -- end-user desire for more powerful microprocessors to run the next generation software, and the equally strong demand for smaller, more mobile computer form factors. With each, the introduction of faster next-generation semiconductors aimed at improving computing power, heat concentration problems increase....

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Miniaturization of Cooling Solutions

May 06, 1999 | Christopher Chapman, Aavid Thermal Products, Inc.

The market's demand for increasingly powerful products, in smaller and smaller packaging, creates a cooling problem. Integrated circuit (IC) lifetime is dependent upon its operating temperature, creating a trade-off situation: either you enlarge the package to accept additional cooling, or you sacrifice IC lifetime....

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

The Basics of Package/Device Cooling

May 06, 1999 | Christopher Chapman, Aavid Thermal Products, Inc.

The most reliable and well-designed electronic device can malfunction or fail if it overheats. Considering thermal issues early in the design process results in a thermally conscious system layout and minimizes costs through the use of passive cooling and off-the-shelf components. When thermal issues are left until completion of the design, the only remaining solution may be a costly custom heat sink that requires all the space available. Incorporating a heat sink or a fan into a product after it is fully developed can be expensive, and still may not provide sufficient cooling of the device. ...

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Larger Packages Fuel Thermal Strategies

May 06, 1999 | Christopher Chapman, Aavid Thermal Products, Inc.

The trend toward surface-mount assembly processes is making ball-grid array (BGA) packaging a popular choice for many types of devices, forcing designers to re-examine cooling of these large packages. While devices in BGAs transfer more heat to the board than leaded devices, the style of BGA packages has a large influence on the ability to transfer heat through other pathways, such as a top-mounted heat sink. Physical characteristics of the BGA further constrain the thermal designer. It takes forethought in board design to successfully accommodate devices that require significant heat dissipation. Multiple solutions exist, however, for BGA packages of all types....

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

How To Size Heat Sinks For Semiconductors

May 06, 1999 | Jeffery Schindler, Aavid Thermal Products, Inc.

As microprocessor speeds increase, their power needs rise proportionally. This also puts higher demands on the voltage regulator that feeds the processor chip. In spite of the increased power, the regulator chip tends to remain the same size.....

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Beat the Heat in Notebooks With Software

May 06, 1999 | Christopher L. Chapman, Aavid Thermal Products, Inc.

Pentium-class portables present significant packaging problems. The heat generated inside a notebook not only reduces microprocessor reliability, but the reliability of peripheries such as hard drives and video chips. Although the processor is the primary heat-generating source, it isn’t always the component least tolerant of temperature......

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

As Cool as a Cucumber: Managing the Heat Produced by IC Developments

May 06, 1999 | Christopher A. Soule

Many of us tend to think of semiconductors as low power, cool devices. But as the number of transistors in an integrated circuit increases, so does power consumption increases and the need to dissipate the resulting heat load. Microprocessors, in particular, consume more and more power with increase in speed and complexity. ...

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Augmented-Fin-Air Cooled Heat Sinks

May 06, 1999 | Christopher A. Soule

Augmented-Fin Air-Cooled Heat Sinks Achieve Higher Performance without Significant Rise in Static Pressure Drop....

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Augmentation Improves Thermal Performance of Air Cooled Heat Sinks.

May 06, 1999 | Christopher A. Soule, Aavid Thermal Products,Inc.

Augmentation of extended surfaces used to dissipate heat increases the overall effectiveness of a heat sink and increases the heat removed per unit volume. This amount of increase depends on the number of augmentations, air flow velocity and ......

Publisher: Aavid Thermalloy, LLC

Aavid Thermalloy, LLC

For nearly 50 years, Aavid has been the world leader in thermal management solutions.

Laconia, New Hampshire, USA

Manufacturer

Optimizing the Wave Soldering Process with Hot Nitrogen Knives

Apr 29, 1999 | Chrys Shea, Siemens, & Gary Shipe, Air Products

The paper describes the effects of a debridging knife on inerted soldering environments in an Electrovert Econopak wave solder machine. It reviews experiments to improve the purity of the soldering environment and results of the tests....

Publisher: Siemens Process Industries and Drives

Siemens Process Industries and Drives

Siemens industrial manufacturing software, process automation, and automation and drives technology increases flexibility, cuts market launch lead time, and significantly reduces energy for manufacturing companies.

Alpharetta, Georgia, USA

Consultant / Service Provider, Manufacturer, Training Provider

VOC-Free Wave Solder Flux Evaluation

Apr 26, 1999 | Chrys Shea, Siemens ICN

The goal of the flux evaluation was to identify one product that would meet the needs of all SICN's wave solder products and processes while producing high quality assemblies. At the outset of the evaluation, it was unclear whether a single flux chemistry could satisfy such a broad range of demands, particularly because SICN's utilization of less aggressive, low-impact chemicals....

Publisher: Siemens Process Industries and Drives

Siemens Process Industries and Drives

Siemens industrial manufacturing software, process automation, and automation and drives technology increases flexibility, cuts market launch lead time, and significantly reduces energy for manufacturing companies.

Alpharetta, Georgia, USA

Consultant / Service Provider, Manufacturer, Training Provider

The Characterization and Comparison of Spray Fluxers

Apr 26, 1999 | Chrys Shea & Tom Chinnici, Siemens Business Communication Systems, Inc., Originally published at Nepcon West '98

An evaluation of two fluxers, one with a reciprocating ultrasonic head and the other with microjets, was performed using nine independent criteria. The paper describes the methods of testing and the results....

Publisher: Siemens Process Industries and Drives

Siemens Process Industries and Drives

Siemens industrial manufacturing software, process automation, and automation and drives technology increases flexibility, cuts market launch lead time, and significantly reduces energy for manufacturing companies.

Alpharetta, Georgia, USA

Consultant / Service Provider, Manufacturer, Training Provider

Intel Packaging Databook

Apr 15, 1999 | Intel Corporation

Intel's Packaging Databook is intended to serve as a data reference for engineering design, as well as a guide to Intel package selection and availability. IC assembly, performance characteristics, physical constants, detailed discussions of SMT, etc....

Publisher: Intel Corporation

Intel Corporation

Intel designs and builds the essential technologies that serve as the foundation for the world's computing devices.

Santa Clara, California, USA

Manufacturer

An Introduction to Solder Materials

Apr 15, 1999 | Brian Bauer, Rick Lathrop

Solder paste is a seemingly simple material that forms one of the foundations of the surface mount assembly operation. If the solder paste does not do its job correctly then first pass yield will be severely reduced. ...

Publisher: Heraeus

Heraeus

We design and manufacture SMT assembly materials.

W. Conshohocken, Pennsylvania, USA

Manufacturer

Speed Printing of SMT Adhesives

Apr 15, 1999 | Richard R. Lathrop Jr., Heraeus

High-speed printing techniques are revealed that break the speed barrier resulting from air entrapment in large apertures at fast squeegee speeds. Adhesive printability test results using conventional thickness stencils to achieve a significant range of d...

Publisher: Heraeus

Heraeus

We design and manufacture SMT assembly materials.

W. Conshohocken, Pennsylvania, USA

Manufacturer