Samsung Electro-mechanics Co., Ltd.

Samsung Electronics Co., Ltd.

Lg Innotek Co., Ltd.

Korea Advanced Institute of Science and Technology

Samsung Led Co., Ltd.

Jong Woon Kim

Won Kyu Jeung

Tae Yoon Kim

Moon Chul Lee

Tae Kyung Lee

Won Jae Han

Chang Hyun Lim

Jung Won Lee

Sang Kee Yoon

Heung Woo Park

Tae Woo Kim

Jun Boum Lim

Hyeong Joon Seo

Jung Eun Noh

Seung Heon Han

Dae Hun Jeong

Seung Joo Shin

Hong Seok Jun

Hee-Chan Kang

Seung Jun Park

Sang Uk Son

Jun Sik Hwang

Sung Jun Lee

Yun Sung Kang

Kwon Jin Kim

Tae Hun Lee

Seung Hun Han

Dai Gil Lee

Hak Sung Kim

Jong Kweon Ha

Na Yeong Byeon

Byoung-Ok Ahn

Min Kyu Choi

Seong Min Lee

Sang Jin Kim

Seung Mo Lim

Jae Chang Lee

Liwei Lin

Minyao Mao

Dae Ho Kim

Byung Chul Kim

Yu Heon Yi

Dong Chang Park

Sung Su Kim

Tae Hyun Kim

Young Ki Lee

Sung Woo Han

Seog Moon Choi

Hwa Sun Lee

Ran Hee Shin

Sang Hyun Shin

Sang Heon Han

Sung Soo Lee

Sung Sun Kim

Sung Min Cho

In Young Kang

Jeong Hoon Ryou

Jung Tae Park

Yoon Sok Park

Sung Wook Kim

Min Seok Kim

Po Chul Kim

Jong Chan Song

Nam Jung Lee

Jong Beom Kim

Kil Soo Son

Jae Sang Lee

Byoung Ok Ahn

Shan Gao

Jin Kook Kim

Sun-Hee Son

Yong Jin Kang

Hyun Jin Bae

Chi Wook Gu

Kwang-Sik Han

Jung Yong Sung

Seung Yeon Han

Mao Minyao

Lin Liwei

Seong Kyu Lee

Jeong Uk Park

Hee Chan Kang

A bulk acoustic resonator includes a first electrode disposed on an upper side of a substrate, a piezoelectric layer disposed on an upper surface of the first electrode, and a second electrode disposed on an upper surface of the piezoelectric layer, wherein an upper surface of at least one of the first electrode and the second electrode has a recess region, wherein a depth of the recess region is D, a width of the recess region is W, and a resonance frequency is F, and ln is a natural logarithm, and wherein [{ln(D*W)}/(−0.59*F)] is [[ln{0.008 (μm)}]/{−0.59*(3.5 GHz)}] or more and [[ln{0.022 (μm)}]/{−0.59*(3.5 GHz)}] or less.

Bulk acoustic resonator

An acoustic wave resonator includes a resonating part disposed on and spaced apart from a substrate by a cavity, the resonating part including a membrane layer, a first electrode, a piezoelectric layer, and a second electrode that are sequentially stacked. 0 &#x212b;&#x2264;&#x394;Mg&#x2264;170 &#x212b; may be satisfied, &#x394;Mg being a difference between a maximum thickness and a minimum thickness of the membrane layer disposed in the cavity.

Acoustic wave resonator

An acoustic resonator includes: a resonating unit including a resonating unit including a piezoelectric layer and first and second electrodes disposed on a lower side and an upper side of the piezoelectric layer, respectively; a substrate disposed on a lower side of the resonating unit; a support unit providing a cavity between the substrate and the resonating unit; and an intermediate metal layer separated from the second electrode and disposed in the resonating unit such that at least a portion thereof is surrounded by the piezoelectric layer and the second electrode.

Acoustic resonator

An acoustic resonator includes: a substrate; a resonant region including a first electrode, a piezoelectric layer, and a second electrode disposed on the substrate, and a reflective layer disposed along a periphery of the resonant region; and a connection electrode extending from the second electrode. The reflective layer includes a second section disposed between the resonant region and the connection electrode, and a first section, and a cross-sectional area of the first section is different than a cross-sectional area of the second section.

An acoustic resonator includes: a resonating unit including a piezoelectric layer, a first electrode disposed on a lower side of the piezoelectric layer, and a second electrode disposed on an upper side of the piezoelectric layer; a substrate disposed below the resonating unit; a support unit forming a cavity between the substrate and the resonating unit; and a pillar extending through the cavity and connecting the resonating unit to the substrate. The resonating unit further includes a first insertion layer disposed above the pillar.

A bulk acoustic wave resonator includes: a substrate; a first electrode disposed above the substrate; a piezoelectric layer disposed above at least a portion of the first electrode; and a second electrode disposed above at least a portion of the piezoelectric layer. A first gap is formed between the piezoelectric layer and one of the first and second electrodes. The first gap includes a first inner gap disposed in an active area of the bulk acoustic wave resonator, and having a first spacing distance between the piezoelectric layer and the one of the first and second electrodes, and a first outer gap disposed outwardly of the active area and having a second spacing distance, different than the first spacing distance, between the piezoelectric layer and the one of the first and second electrodes.

Bulk acoustic wave resonator

A bulk acoustic resonator includes: a substrate including an upper surface on which a substrate protection layer is disposed; and a membrane layer forming a cavity together with the substrate, wherein a thickness deviation of either one or both of the substrate protection layer and the membrane layer is 170 &#x212b; or less.

Bulk acoustic resonator and filter including the same

An air conditioner and a control method thereof perform cooling through an outlet if room temperature or room humidity is high to reduce the room temperature or the room humidity, and closing the outlet to perform cooling at low velocity through an outlet hole if room temperature or room humidity reaches a predetermined value so that a user can little feel the wind velocity of cooling of the air conditioner, while maintaining indoor space at pleasant temperature or humidity. By performing cooling at low velocity through the outlet hole formed in the lower portion of the air conditioner, it is possible to cool the lower area of indoor space at pleasant temperature when a user is asleep.

Air conditioner and control method thereof

An acoustic resonator includes a membrane layer disposed on an insulating layer; a cavity formed by the insulating layer and the membrane layer; a resonating portion disposed on the cavity and having a first electrode, a piezoelectric layer, and a second electrode stacked thereon; a protective layer disposed on the resonating portion; and a hydrophobic layer formed on the protective layer.

Acoustic resonator and method for fabricating the same

An acoustic resonator includes: a central portion; an extension portion extended outwardly of the central portion; a first electrode, a piezoelectric layer, and a second electrode sequentially stacked on a substrate, in the central portion; and an insertion layer disposed below the piezoelectric layer in the extension portion, wherein the piezoelectric layer includes a piezoelectric portion disposed in the central portion, and a bent portion disposed in the extension portion and extended from the piezoelectric portion at an incline depending on a shape of the insertion layer.

Acoustic resonator and method of manufacturing the same

An air conditioner and a method for controlling the same are disclosed. The air conditioner includes a compressor; an indoor fan configured to blow an indoor air; and a controller configured to change and control a revolutions per minute (RPM) of the indoor fan to a predetermined time when the compressor is off.

Air conditioner and method for controlling the same

Growing community of inventors

Gyunggi-do, South Korea

Jong Woon Kim