Production standardization requirements of SIM card holder and SD card holder

SD card (Secure Digital MEmory Card) is a storage device based on semiconductor flash memory. Due to the small size, light weight, large storage capacity, fast data transmission, flexible movement, data security and confidentiality of the SD card, and the integrated structure, there is no need to worry about the damage of mechanical movement, so it is used in mobile phones, MP3, walkmans, digital cameras, digital cameras, etc. Cameras, notebook computers and other equipment are widely used, therefore, the corresponding SD card holders have also been developed in large numbers. SIM card holders and SD card holders should meet the requirements for linking and information exchange between SIM cards, SD cards and systems. Enterprises should formulate product standards as required, and make provisions for SIM card holders and SD card holders.

1. Applicable General Specifications

The IC card applicable to the socket stipulated in SJ/T11166 "General Specification for Integrated Circuit (IC Card) Socket" shall comply with the definition specified in GB/T16649 "Identification Card Integrated Circuit Card with Contacts" (ISO7816). The SIM card is exactly this kind of card, so SJ/T11166 is the general specification applicable to the SIM card holder.
Although the SD card holder is not a socket for identification cards, it is similar in structure and function to the SIM card holder, but the interface size is different, and the technical requirements are somewhat different. SJ/T11166 can be used as the applicable general specification.

2. Structural size

Structural dimensions include interface dimensions and external dimensions, which must be standardized for any socket. The contact position and size of the identification card meet the requirements of GB/T16649.2, and the position and contact orientation of the corresponding socket contacts are specified in SJ/T11166. The contact position and contact range of the contact element specified by us according to the size of the actual SIM card meet the requirements.

3. Conclusion

According to the needs of users and the characteristics of the use of SIM card holders and SD card holders, SJ/T11166 is selected as the general specification, which stipulates the structural dimensions, external dimensions, performance requirements and the severity of test methods. According to the latest standards, the detailed specifications of the SIM card holder and SD card holder are formulated, and the provisions of the detailed specifications are implemented in production, and the standardization of the SIM card holder and SD card holder is achieved. Environmental protection requirements are not specified in the detailed specifications, but it has become a consensus that all materials used in products must meet environmental protection requirements.
If SIM card holders and SD card holders are to be standardized in the whole industry, all manufacturers should negotiate and formulate industry standards.