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Tyco compression contacts cut BGA electrical disturbances

Posted: 05 May 2003 ?? ?Print Version ?Bookmark and Share

Keywords:Tyco electronics? matrix series? bga socket?

Tyco Electronics' Matrix Series BGA sockets use what the company calls a compression contact technology to eliminate electrical disturbances that traditional contact devices can cause. The sockets are targeted at a variety of test and development applications.

To optimize electrical characteristics, the sockets use a metallized-particle interconnect polymer, a unique material system designed for high-density sockets and connectors. The MPI material is formed into columns 0.635mm in diameter and <1mm high, held in a grid pattern by a thin polyimide substrate. When the columns are mechanically compressed, electrical characteristics are optimized, according to the company.

Key electrical specifications include 4A per column maximum and a contact resistance of 50 milliohms maximum. Insulation resistance is 1 gigaohms (100Vdc), while the capacitance rating is 0.1pF. The standard operating temperature range is 0C to 90C, and the compression force is 70 grams/contact (nominal).

Multiple configurations

These sockets can be made in various configurations without tooling charges. Standard configurations include fully populated arrays ranging from 10x10 to 60x60, with as many as 3,600 contacts in one array. Available in standard pitches of 1.27mm, 1mm, and 0.8mm, the sockets accept standard Jedec solder ball sizes.

Standard components required for the necessary compression loads of the socket are also available from Tyco. Each kit includes a bolster plate, spring plate and top plate for all array sizes. Pricing for a 2,500-position socket is $150 in 25-piece lots. Delivery is six to eight weeks.

EE Times

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