US 12,278,619 B2
Filter with bulk acoustic wave device having raised frame structure
Yiliu Wang, Irvine, CA (US); Jiansong Liu, Fremont, CA (US); and Nan Wu, Irvine, CA (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Dec. 13, 2021, as Appl. No. 17/549,511.
Claims priority of provisional application 63/131,696, filed on Dec. 29, 2020.
Claims priority of provisional application 63/131,692, filed on Dec. 29, 2020.
Prior Publication US 2022/0209749 A1, Jun. 30, 2022
Int. Cl. H03H 9/54 (2006.01); H03H 9/02 (2006.01); H03H 9/13 (2006.01); H03H 9/17 (2006.01); H03H 9/62 (2006.01); H03H 9/64 (2006.01)
CPC H03H 9/54 (2013.01) [H03H 9/02007 (2013.01); H03H 9/13 (2013.01); H03H 9/171 (2013.01); H03H 9/62 (2013.01); H03H 9/6433 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A filter with bulk acoustic wave devices, the filter comprising:
a first bulk acoustic wave resonator including a first raised frame structure within an active region, the first raised frame structure being a multi-layer raised frame structure having a multi-gradient raised frame structure; and
a second bulk acoustic wave resonator including a second raised frame structure within the active region, the first raised frame structure having at least one more raised frame layer than the second raised frame structure, the first and second raised frame structures increase reflection of lateral energy within the active region.