PTI Blog

Factory Automation for Microelectronics Assembly

Posted by Palomar Technologies MarCom Team on Tue, Feb 19, 2013 @ 03:36 PM

Factory automation is a cost-effective and resource-efficient solution for many complex microelectronic assembly challenges. Factory automation offers improved throughput and yield, often attributed to the reduction of direct employee contact with the assembly process. Precision robotic control combined with automated production line data monitoring reduces process variation and virtually eliminates assembly errors. Identification and tracking of assembly processes, materials, and production quality improve overall facility efficiency.

Form factor and presentation of materials—such as packages, substrates, and components—are easily applicable for factory automation through the implementation of industry standards such as SMEMA, JEDEC, and SEMI. Unique, custom, and application-specific presentation and assembly methods may be applied when necessary.

In microelectronics assembly, there are three common automation solutions:

  1. Production Tooling and Fixtures—improve tooling requirements for your manual or automated part build recipe
  2. Production Work Cell—one piece of equipment configured and tooled to build your assembly
  3. Production Line—multiple distinct pieces of equipment linked together to provide distinct processes of your overall part build recipe

Of these three solutions, the latter two are commonly referred categories of factory automation for Islands of Automation and In-Line Assembly Systems.

semiconductor equipment automated production lineIslands of Automation – individual processes, such as component attach or wire bond, are performed within independent, automated work cells; the packages are fed automatically through the work cells via a system of process carriers (boats) and magazine handlers. The value of an island of automation is through greater production flexibility, faster product changeover, and often less integration time than an in-line system. However, assembly throughput is dependent upon scheduling separate operations and this configuration may require more labor or input/output process carriers to support independent work cells.

In-Line Assembly Systems – packages are fed automatically through the production line via a system of process carriers and magazines in the same way as an island of automation; however, the production line may require buffers to balance throughput and the production rate is fixed at the rate of the slowest process in the line.

inline assembly production line automated die attach

The value of an inline system is through higher volume, low-mix assembly of a single type of product with minimal or no product changeover and greater yield due to reduced operator contact with the product and materials. Since in-line assembly process operations run together as a whole production line, this configuration may require less labor to operate than islands of automation. A fixed production rate allows for more accurate production planning and potentially higher throughput. Larger assembly lines can take on such aspects as UV epoxy curing, ultra-high accuracy pick and place, heated tools for eutectic die attach, curing ovens, hot bars, precision dispensing systems, wafer die ejectors (punch ups), and customized presentation stages for odd-shaped devices.

1.5um die attach production line
In performing complex microelectronics packaging, extreme precision and accuracy are imperative, in addition to repeatability and quality. Only an automated robot can handle an application at 1.5micron, 3-sigma output requirements. Because robots are automated and can “follow the rules” exactly each time, they are faster, more efficient, and create a higher quality package, thus ultimately lowering the cost of precision.

A Problem is Half Solved When it is Properly Defined

Organizations that require high-throughput and high-accuracy production greatly benefit with an in-line assembly solution. When researching a manufacturer for factory automation solutions, it is vital to understand the depth and involvement of program management offered by the manufacturer.

Top Considerations When Purchasing A Bonder

The goal of program management is to improve production flow so that assembly time is reduced and product quality, yield, and profit increases. Proper program management should define extensive options and solutions for all aspects of automating a production line build process, including but not limited to:

  1. Project scope and expected outcome
  2. Size and type of material
  3. Methods and processes that can be implemented to achieve packaging solution
  4. Parameters within the packaging process
  5. Software options or customized software development
  6. Standard or customized tooling required
  7. Applications/process development needs
  8. Delivery and installation of equipment at desired factory location

Learn More About Factory Automation Solutions

The Value of Automation
Value of Automated Component Packaging

 Automating MEMS Assembly

Automating MEMS Assembly

Precision Assembly for High-Volume HB LEDs

HBLED Precision Assembly Tech Paper

Automated Hotrail RF Assembly

Automated Assembly Tool for Precision, High-Speed RF Die Attach Applications 

Jessica Sylvester
Marketing Communications
Palomar Technologies, Inc.