Antenna structure for communication module and manufacturing method thereof

Abstract

The invention relates to an antenna structure for a communication module and a fabrication method thereof. The antenna structure comprises a first magnetic substance layer, a second magnetic substance layer, a third magnetic substance layer, a fourth magnetic substance layer, a fifth magnetic substance layer, a sixth magnetic substance layer and a seventh magnetic substance layer which are sequentially arranged, wherein the third magnetic substance layer, the fourth magnetic substance layer and the fifth magnetic substance layer are internally provided a coil-shaped conductor pattern so as to form a magnetic core structure; the first magnetic substance layer is provided with a plurality of bonding pad electrodes, the seventh magnetic substance layer is provided with a plurality of second bonding pad electrodes, the first bonding pad electrodes comprise a first feed-in bonding pad electrode, a second feed-in bonding pad electrode and a plurality of dummy bonding pad electrodes; the third magnetic substance layer, the fourth magnetic substance layer and the fifth magnetic substance layer all have first magnetic permeability, the first magnetic substance layer, the second magnetic substance layer, the sixth magnetic substance layer and the seventh magnetic substance layer all have second magnetic permeability, and the first magnetic permeability is greater than or equal to the second magnetic permeability. The antenna structure adopts materials with high magnetic permeability in the magnetic substance layers containing the magnetic core structure, so that an inductance value of a small-size antenna can be improved.

Description

technical field [0001] The invention relates to an antenna structure and a manufacturing method thereof, in particular to an antenna structure for a communication module and a manufacturing method thereof. Background technique [0002] Mobile phones or any type of mobile communication devices have become the equipment that modern people carry with them. In the past, the main functions of mobile communication devices were limited to functions known to the public such as making calls, sending text messages, or surfing the Internet wirelessly. However, with the advancement of technology, and due to the portable nature of mobile phones, the industry has begun to conceive of integrating some functions that meet the needs of daily life into mobile phones, such as contactless smart cards. The so-called non-contact smart card is to enable the chip installed in the card to function through the proximity sensing method. At present, there are many occasions where contactless smart ca...

AI Technical Summary

Problems solved by technology

However, most of the existing near-field communication antennas have a rather large area. Under the current trend of miniaturization of mobile communication products, the size of the near-field communication antenna also needs to be reduced. However, when it is necessary to miniaturize the near-field communication antenna, it will encounter Insufficient antenna inductance. In addition, in the process of miniaturization, the joint between the integrated circuit chip and the pad of the near field communication antenna is not strong enough.

Images