Journal of SMT Article


Author: A. Kulkarni et al.
Company: Hewlett Packard Company
Date Published: 7/1/2002   Volume: 15-3

Abstract: Press-pin/plated-trough-hole (PP/PTH) technology has been utilized in the electronic systems for more than 25 years [1]. It replaces traditional through-hole wave soldering for board attachments and is widely used in the connector industry.

Many researchers have been studying mechanical and electrical reliability of PP/PTH interconnection [1,2,3]. The research tools varied from experimental testing to finite element (FE) numerical model development [3,4,5]. Most of the published literature on PP/PTH studies uses two-dimensional (2D) FE models that are limited and simplified, not fully capturing the interaction physics [6]. Developing a three-dimensional (3D) model could be more accurate in predicting their interactions and reliability, as the PP/PTH assembly is inherently 3D in nature [6].

A team composed of Georgia Institute of Technology and Hewlett Packard Company personnel has developed a 3D FE model of the PP/PTH assembly as a joint venture over the past few years. In this work, a combined numerical and experimental program addresses some of the design challenges including complex geometry, PTH sizes, and material non-linearities. Analytically, a parametric model was developed in ANSYS. Experimentally, two different types of pins have been assessed for reliability under three different PTH surface finishes and three different drilled-hole-sizes (DHS).

This model can be used to make design decisions involving:

  • Simulating and predicting insertion/extraction forces for the PP in the PTH.
  • Predicting and visualizing the damage to PTH walls due to the compliant pin interactions.
  • Predicting thermo-mechanical reliability of PP/PTH assembly.
  • This paper will explain, in detail, construction of the 3D PP/PTH model, the model physics, experimental validations conducted, and the results obtained. And finally, it will describe the ongoing and future work planed to make the model more useful.

    Members download articles for free:

    Not a member yet?

    What else do you get when you join SMTA? Read about all of the benefits that go along with membership.

    Notice: Sharing of articles is restricted to just your immediate work group. Downloaded papers should not be stored on an external network or shared on the internet.


    SMTA Headquarters
    6600 City West Parkway, Suite 300
    Eden Prairie, MN 55344 USA

    Phone +1 952.920.7682
    Fax +1 952.926.1819