SIM (Subscriber Identity Module) card and manufacturing method thereof

Abstract

The invention discloses an SIM (Subscriber Identity Module) card and a manufacturing method thereof. The SIM card comprises a card base and a 4FF SIM card module, wherein a 2FF SIM card sleeve is formed on the card base through cutting in a spearing way; a 3FF SIM card sleeve is formed on the 2FF SIM card sleeve through cutting in a spearing way; a first slot is formed in the 3FF SIM card sleeve; the difference between the thickness of the 3FF SIM card sleeve and the depth of the first slot is equal to the thickness of a 4FF SIM card; the card base under the first slot is in seamless connection with the 3FF SIM card sleeve; two layers of card slots are formed in the bottom surface of the first slot; the horizontal dimension of the first layer of card slot is equal to the overall dimension of a 4FF SIM card module, and the depth of the first layer of card slot is equal to the thickness of a carrier band of the 4FF SIM card module; the second layer of card slot is a position for accommodating the encapsulating compound of the 4FF SIM card module; the 4FF SIM card module is fixedly connected with the card base under the 4FF SIM card module. According to the SIM card, the 4FF SIM card, the 3FF card sleeve and the 2FF card sleeve are integrated onto one card base, and the international standards of the 2FF SIM card, the 3FF SIM card and the 4FF SIM card are met at the same time.

Description

technical field [0001] The invention relates to the fields of smart card technology and wireless communication technology, in particular to a SIM card and a manufacturing method thereof. Background technique [0002] At present, mobile electronic devices such as mobile phones have become an inaccessible part of people's lives. In order to better meet people's application requirements, there are more and more types of SIM cards. The existing SIM cards are mainly divided into the following three types: a 2FF SIM card with a size of 25mm×15mm is a standard card, a 3FF SIM card with a size of 12mmx15mm is a Micro SIM card, and a 4FF SIM card is a Nano SIM card. A Micro SIM card is one-third smaller, 60% smaller than a regular SIM card, and 15% thinner. In order to meet the application requirements of mobile phones for different SIM cards, the existing SIM card manufacturing processes mainly include the following types: [0003] 1) It has a separate 4FF Nano-SIM card technolog...

AI Technical Summary

Problems solved by technology

[0009] (2) After the 4FF card is cut, because it is a single SIM card, it only needs to meet the 4FF international standard, but there is a tolerance when cutting the 4FF PLUG-in, and the size of the slot after milling the 3FF card sleeve It needs to be matched with 4FF, and there are errors in equipment milling slots. In order to allow 4FF SIM cards to be placed in 3FF card slots in batches, the size of 3FF card slots needs to be slightly larger than the size of 4FF SIM cards, which makes it easy for 4FF SIM cards to be replaced by 3FF cards. drop in slot

It is inconvenient to use, and customers need to purchase both 4FF card and 2FF+3FF card sets at the same time to use

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