• Latest
  • Trending

Sockets and Chip Carriers

September 14, 2022

Microwave Multi Line Connectors Mounting and Handling Precautions

March 27, 2023

Samtec New Interconnects Enhances Power and Signal Integrity

March 21, 2023
PCNS Passive Components Symposium 11-14th September 2023

PCB Via Design Selection; Plugging-Filling-Tenting

March 20, 2023

Lemo Releases New Multi Coaxial High Frequency Connector

March 2, 2023

Würth Elektronik Introduces Crimp SKEDD Connectors

March 1, 2023

binder Offers Sensor Connectors in Stainless-Steel to Protect Against Corrosion

March 1, 2023

Board-to-Board Connection & Antennas HF Connection

February 20, 2023

How to Ensure Board-to-Board Connectors Meet High-Speed Automotive Assembly and Use Requirements

February 16, 2023

Amphenol Enhanced its ePower-Lite EV Line to Include 3-Pole Connector

February 15, 2023

BASIC PCB Design Rules – Layout

February 15, 2023

Connector Inrush Current Explained

February 3, 2023

M8 Connectors for Smart Farming Applications

January 31, 2023
  • Privacy Policy
inter-connection blog
  • NEWS
  • Knowledge base
  • Sister Sites
    • Passive Components Blog
    • PCNS Symposium
    • The Passives Times
    • EPCI Home
  • About
No Result
View All Result
  • NEWS
  • Knowledge base
  • Sister Sites
    • Passive Components Blog
    • PCNS Symposium
    • The Passives Times
    • EPCI Home
  • About
No Result
View All Result
inter-connection blog
No Result
View All Result

Sockets and Chip Carriers

September 14, 2022
A A

As noted previously, the definition of connector type is determined by several factors including the contact spring geometry, the housing geometry and the method of permanent connection. In this discussion the LOI levels where the connector systems are used will also be identified for reference. The discussion of connector types will be general. Many variations on each type exist with specifics depending on the industry being served. This is especially the case in computer/telecom applications.

Sockets and chip carriers, which are also sockets, are used primarily at Level 1. There are two styles of chip carriers depending on the functionality and pin count of the IC. Low pin count ICs (less than 100) have their leads around the periphery of the IC. Chip carriers for these applications may be through hole or SMT soldered to the board, Figure 2.123a and b respectively. The chip carrier contacts are typically tin plated cantilever beam designs, Figure 2.124.

Fig. 2.123: PLCC socket
Fig. 2.124: PLCC beam design and IC

As CPU technology and functionality increased chip carriers have evolved to meet demands to interconnect with high lead count (over 1000 positions) integrated circuits of three types, Pin Grid Array (PGA), Land Grid Array (LGA) and Ball Grid Array (BGA) packages. As the names indicate, the IC leads are distributed in arrays over the base of the IC package. PGAs have pins extending from the IC package, LGAs have lands on the package base and BGAs have solder balls on the package base. Needless to say the sockets for these IC package types are different. All of these packages can be connected to a PWB by soldering or mechanically. PGAs are wave soldered and LGAs and BGAs are typically reflow soldered. The mechanical connections in each case are pressure connections, analogous to separable connections discussed in Chapter II/2.2 Contact Springs, though the PWB connection is intended to be permanent. The contact designs differ among the three types. The contact finish is often gold over nickel. Due to the high pin counts mechanical connections are mechanically assisted by a variety of means. The IC package is also connected to a heat sink.

Related

Source: Wurth elektronik
Next Post

Board-to-Board Connectors

Wire-to-Wire and Wire-to-Board Connectors

I/O Connectors

Popular Posts

  • Crimped Connections

    0 shares
    Share 0 Tweet 0
  • Basic Principles of Connectors

    0 shares
    Share 0 Tweet 0
  • Space Saving Molex Connector in AR/VR System designs

    0 shares
    Share 0 Tweet 0
  • THR (Through Hole Reflow) Technology: Introduction & History:

    0 shares
    Share 0 Tweet 0
  • The Electrical Interface: Contact Resistance

    0 shares
    Share 0 Tweet 0

Archive

2023
2022

  • About
  • Inter-Connection News
  • Knowledge base
  • NEWS
  • Privacy Policy
  • Sister Sites

© 2023 EPCI - Premium Passive Components & Inter-Connect News

No Result
View All Result
  • About
  • Inter-Connection News
  • Knowledge base
    • Applications
    • Basic Principles of Connectors
    • Design Selection Assembly
  • NEWS
  • Privacy Policy
  • Sister Sites

© 2023 EPCI - Premium Passive Components & Inter-Connect News

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.