September, 2013
www.us-tech.com
Page 51
Innovative Socket Technology Enables Multi-GHz Package Testing
dling clock rates through multi-GHz speeds, pin densities that can be finer than a 0.4mm pitch, and pin counts that can exceed 1000. Testing such packages can be challenging, but socket technology offers the means of testing the functionality of high-speed IC packages without damaging them. Effective test sock- ets require short signal paths for less resistance, good electrical insulation to minimize signal losses, and good thermal management (especially when testing at high power levels). Other parameters are also impor- tant, including durability, power con- sumption, assembly methods, and operating environment. Fortunately, the Silver ball Matrix (SM) GHz test socket from Ironwood Electronics represents a solution that is fast, durable, and supports testing of high-density packaging.
T
oday’s electronic packages must perform at the levels of the circuits they protect, han-
By Ila Pal, Vice-President of Marketing, Ironwood Electronics The SM GHz Socket from
Ironwood Electronics, designed to test IC packages with fine 0.3mm pitch, is a sequel to standard GHz sockets. Available in a wide range of models, these SM GHz Sockets are available for applications ranging from compact production units to robust prototype and test units. The sockets are designed so that inser- tion force is evenly distributed across the top of an IC under test, pushing package solder balls into high-speed,
z-axis silver-ball columns. The socket incorporates the unique SM Contact, which uses precise silver balls held together by a proprietary conductive
ed in a nonconductive flexible elas- tomer substrate with a patented solid core for enhanced durability and reliable performance over time,
A test socket is an electromechanical device that
provides a removable interface between an IC package and a system circuit board.
formulation. These conductive columns (with diameter optimized for 50 ohm impedance) are suspend-
temperature, and cycling. This flexi- ble substrate is very compliant and
Continued on page 53
4000Plus Micro Materials Testing
The Nordson DAGE 4000Plus delivers a wide range of new features that enable it to be used for micro materials testing
The SM GHz Socket supports high-speed, high-density testing.
A test socket is an electro-
mechanical device that provides a removable interface between an IC package and a system circuit board. When properly designed, this inter- face exhibits minimal loss or reflec- tions, with minimal degradation of signal integrity (SI). Having a removable interface can simplify and save the costs of assembling, rework- ing, and upgrading a product. For
The 4000Plus test platform with Paragon™ software builds on the strong Nordson DAGE tradition and reputation of handling and testing at low geometries.
The 4000Plus offers a wide range of optical solutions for positioning, viewing, recording tests and failure modes, making it the perfect choice where a more comprehensive materials test tool is required.
This cross-sectional photograph shows the design of the SM GHz Socket contacts -- columns of tiny, precise silver balls.
example, when testing an IC with a system printed-circuit board (PCB), the socket is typically semi-perma- nently attached (without solder) to the system board while the IC can be easily inserted into or removed from the socket for ease of evaluation without disturbing connections to the PCB. Having a socket on a system board can also simplify in-field test- ing and maintenance.
Application Specific Tooling Nordson DAGE has over 50 years of micro testing experience and continues to evolve test methods. An extensive range of standard and custom tools are available.
www.nordsondage.com |
globalsales@nordsondage.com See at IMAPS Booth 701
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