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Non-Conductive Electric Connector Contact Coating

IP.com Disclosure Number: IPCOM000033139D
Publication Date: 2004-Nov-29
Document File: 2 page(s) / 66K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a non-conductive material that coats or sheaths surrounding contacts; the coating or sheath material prevents shorting on adjacent contacts. Benefits include lowering system costs.

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Non-Conductive Electric Connector Contact Coating

Disclosed is a method for a non-conductive material that coats or sheaths surrounding contacts; the coating or sheath material prevents shorting on adjacent contacts. Benefits include lowering system costs.

Background

Tightly spaced contacts can overlap and short together. This is particularly true of LGA contacts. When designing contacts, it is a challenge to get the right combination of deflection and load on the circuit pad, without overloading the contacts and pushing them together. This “right combination” maximizes contact deflection within a mixed pitch array.  Because a large deflection range for the socket contacts is needed, the design of the beam is critical. By optimizing the direction that the contact can lay within the pitch of a given array, the beam length can be maximized. To account for the assembly concerns of the contact beam within the socket body, the axis of the beam contact tip should be offset from the axis of the solder ball. This allows the contact to be inserted into the socket body and allows the beam length to be at its maximum.

Currently, the process does not allow the contact pitch to be tightly spaced, and this keeps the LGA contact beam lengths short (see Figure 1). This limits the envelope of deflections and loads that can be used.

General Description

The disclosed method uses a coating or sheath placed around areas of a contact that could interfere or intersect, causing a short. Potent...