AD1672AP_AD22100KRZ Introduction

688367214G changes life, 5G changes society, but this change is not so easy. . This reflects, to a certain extent, the speed at which 5G communications are advancing at the individual user level. According to the China Academy of Information and Communications Technology, domestic 5G mobile phone shipments from January to April 2021 will be 91.267 million units, accounting for 72.7% of the overall market, a year-on-year increase of 38.4%. 2020 is the first year of global 5G commercialization as defined by ITU, and China will be a year earlier.

In April 2019, Diodes completed the acquisition of Texas Instruments' 150mm/200mm wafer fab (GFAB) in Greenock, Scotland, UK, as part of TI's strategy to gradually abandon outdated capacity. Texas Instruments currently has 15 wafer fabs in 9 countries, of course, these plants include outdated capacity that is about to close, as well as new 300mm capacity.

AD1672AP_AD22100KRZ

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AD1672AP_AD22100KRZ

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AD1672AP_AD22100KRZ

However, the thin film structure needs to be strong enough to be unaffected by subsequent processes. Compared with BAW-SMR, a smaller part of the membrane type is in contact with the underlying substrate, which is not easy to dissipate heat.

There are also different structures where sound waves propagate as transverse waves. In the above-mentioned BAW-SMR and FBAR?filter diagrams, sound waves propagate in the form of longitudinal waves, that is, the direction of particle vibration and the direction of wave propagation are parallel.

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