Browse Prior Art Database

Method for an improved spring design for securing an assembly package in a pocket during automated processing

IP.com Disclosure Number: IPCOM000006856D
Publication Date: 2002-Feb-06
Document File: 4 page(s) / 30K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for an improved spring design for securing an assembly package in a pocket during automated processing. Benefits include improved functionality.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 50% of the total text.

Method for an improved spring design for securing an assembly package in a pocket during automated processing

Disclosed is a method for an improved spring design for securing an assembly package in a pocket during automated processing. Benefits include improved functionality.

Background

              Unacceptable substrate-out-of-pocket occurrences are impacting both capacity and yield. Conventional spring designs have extremely small contact surfaces, which are a point on a radius that provides very poor gripping of the package in the pocket (see Figure 1).

Description

      The disclosed method improves the ability to secure substrates, interposers, or other assembly components in a metal carrier. This clip design and methodology is a simple one-piece stamping that is formed to meet all of the conventional equipment and processing requirements.

      The first key element of design and method is a secondary lower pressure contact tab that rotates under pressure to enable a parallel line contact with the package when operator leg is released.

              The second key element is that the profile of the spring has change to strengthen the inner arms causing most of the distortion to occur in a controlled area of the outer arm segment.

              The third key element is a change in the profile of the outer arm in the zone behind the new tab, providing a thinner torsion zone that aids in proper parallel-line contact.

 Advantages

              The technical advantages of the disclosed method include (see Figure 2):

•             A secondary flexible tab to align the contact surface parallel to the side of the package that it secures

•             Minimal negative impact on the original designed spring’s multiple compression zones by making the inner arms more robust and causing the planned distortion to...