Single shot molding method for COB USB/EUSB devices with contact pad ribs

摘要

A dual-personality extended USB (EUSB) system supports both USB and EUSB memory cards using an extended 9-pin EUSB socket. Each EUSB device 101 includes a PCBA having four standard USB metal contact pads disposed on an upper side of a PCB, and several extended purpose contact springs that extend through openings defined in the PCB. A single-shot molding process is used to form both an upper housing portion on the upper PCB surface that includes ribs extending between adjacent contact pads, and a lower molded housing portion that is formed over passive components and IC dies disposed on the lower PCB surface. The passive components are mounted using SMT methods, and the IC dies are mounted using COB methods. The extended 9-pin EUSB socket includes standard USB contacts and extended use contacts that communicate with the PCBA through the standard USB metal contacts and the contact springs.