TWI555199B - 具有場板的半導體元件 - Google Patents

具有場板的半導體元件 Download PDF

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Publication number
TWI555199B
TWI555199B TW099128303A TW99128303A TWI555199B TW I555199 B TWI555199 B TW I555199B TW 099128303 A TW099128303 A TW 099128303A TW 99128303 A TW99128303 A TW 99128303A TW I555199 B TWI555199 B TW I555199B
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Taiwan
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layer
electrode
etch stop
iii
electrode defining
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TW099128303A
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TW201119033A (en
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儲榮明
可菲羅柏特
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全斯法姆公司
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Description

具有場板的半導體元件
本發明是關於半導體電子元件,特別是具有場板的元件。
迄今,現代功率半導體元件,其包括例如:功率金氧半導體場效電晶體(MOSFET)和絕緣閘極雙極性電晶體(IGBT)之元件,一般是以矽(Si)半導體材料來製作。近來,因碳化矽(SiC)功率元件的優越性質而開始被研究。III族氮化物(III-N)半導體元件目前是新興受矚目的候選者,其可用於承載大電流、支援高電壓及提供很低的電阻、高電壓元件操作和快速切換時間。如第1圖所示,典型的III-N高電子遷移率電晶體(HEMT)包含基板10、在基板上的通道層11(如氮化鎵(GaN)層)、和在通道層上的阻障層12(如AlxGa1-xN層)。二維電子氣體(2DEG)通道19設於通道層11中,其接近通道層11與阻障層12之間的界面處。源極14和汲極15分別構成連接2DEG通道的歐姆觸點(ohmic contact)。閘極16調節位於閘極區的2DEG部分,意即位於閘極16的正下方。
場板通常用於III-N元件來塑形在元件之高場區的電場,藉以降低峰值電場(peak electric field)及提高元件崩潰電壓(device breakdown voltage),進而容許更高電壓操作。具場板之III-N高電子遷移率電晶體(HEMT)的實例繪示於第2圖。除了第1圖元件所包括的各層外,第2圖元件包括場板18,其連接閘極16,以及位於場板與阻障層12之間的絕緣層13(如氮化矽(SiN)層)。場板18可包括或由與閘極16相同的材料所組成。絕緣層13可當作表面鈍化層,以防止或抑制在絕緣層13與III-N材料相鄰的表面上的電壓波動。
已經證實傾斜場板在降低峰值電場及提高III-N元件的崩潰電壓上特別有效率。第3圖顯示類似第2圖之III-N元件,但其具有傾斜場板28。在此元件中,閘極16和傾斜場板28是由單一電極29所構成。絕緣層23(其可為SiN)含有凹部,其至少界定電極29的部分形狀。在此,絕緣層23將稱為「電極定義層23」。電極定義層23亦可當作表面鈍化層,以防止或抑制在電極定義層23與III-N材料相鄰的表面的電壓波動。此元件之閘極16和傾斜場板28可藉由以下步驟來形成:首先沉積電極定義層23,使其覆蓋阻障層12的整個表面、接著在包含閘極16的區域中蝕刻穿過電極定義層23而形成凹部、以及最後,至少在凹部內沉積電極29。
在許多使用III-N元件的應用中,例如高功率與高電壓應用,為了防止閘極漏電,因此在閘極16與下層的III-N層之間設置閘絕緣體。第4圖顯示具有傾斜場板和閘絕緣體的元件。第4圖的元件可藉由稍微修改第3圖元件之製程來實施。就第4圖的元件而言,在電極定義層23中的凹部僅部分蝕穿該電極定義層(而非完全貫穿該層),其後沉積電極29。在此元件中,位於閘極16與下層的III-N層間的電極定義層23部分可做為閘絕緣體。
在一態樣中描述III族氮化物(III-N)元件,其包括III-N材料層、位於III-N材料層表面之絕緣層、位於遠離III-N材料層的絕緣層對側之蝕刻終止層、位於遠離絕緣層、遠離蝕刻終止層的蝕刻終止層對側之電極定義層、以及電極。在電極定義層中形成凹部,以及在凹部內形成電極。
對於在此所描述的元件來說,可應用一或多個下列敘述。電極可包括場板。場板可為傾斜場板。在電極定義層中的部分凹部可具有角度壁面(angled wall),該角度壁面至少一部分與蝕刻終止層的主要表面呈非垂直角度,該角度壁面定義該傾斜場板。非垂直角度可介於約5度至約85度之間。絕緣層可為鈍化層。絕緣層可由氧化物或氮化物所組成。絕緣層的厚度約為2-50奈米。絕緣層的每單位面積電容為約0.8-40毫法拉/平方公尺。電極定義層可由氧化物或氮化物所組成。電極定義層的厚度至少約為100奈米。絕緣層與電極定義層的合併厚度可足以實質抑制分散。蝕刻終止層的厚度約為1至15奈米。蝕刻終止層可由氮化鋁所組成。電極定義層和蝕刻終止層可由不同材料所組成。蝕刻終止層和絕緣層可由不同材料所組成。凹部可形成在蝕刻終止層中。
在一些實施例中,III-N元件為二極體。該二極體可包括一或多個下列特徵。凹部可形成在絕緣層中。第一部分的III-N材料層可具有第一組成,第二部分的III-N材料層可具有第二組成,其中第一組成與第二組成間的差異可在III-N材料層中形成二維電子氣體(2DEG)通道。該二極體包括陰極,其中一部分的電極為陽極,該陽極對III-N材料層形成實質的蕭特基接觸(Schottky contact),以及該陰極與2DEG通道電氣接觸(electrical contact)。凹部可延伸到III-N材料層中並且該電極位於III-N材料層的一部分凹部內。凹部延伸穿過2DEG通道。在元件之第一區的閾值(threshold)可大於約-15伏特(V),其中第一區包含部分元件,其位於陽極區與陰極之間並與陽極區相鄰。在元件操作期間,絕緣層的厚度足以防止大於約10微安/毫米的外洩電流通過絕緣層。電極可為陽極電極,且元件更進一步包含陰極。
在一些實施例中,元件為高電子遷移率電晶體(HEMT)。HEMT可包括一或多個下列特徵。第一部分的III-N材料層可具有第一組成,以及第二部分的III-N材料層可具有第二組成,其中第一組成與第二組成間的差異可在III-N材料層中形成2DEG通道。元件可包括源極和汲極,其中部分電極為閘極,並且源極和汲極與2DEG通道電氣接觸。元件閾電壓(threshold voltage)可大於約-30V。選擇絕緣層的厚度,使得元件閾電壓可大於約-30V。在元件操作期間,絕緣層的厚度足以防止大於約100微安的外洩電流通過絕緣層。電極可為閘極電極,且元件更進一步包含源極和汲極。該元件可為場效電晶體(FET),其中當以約800V或小於800V之源極-汲極偏壓,將元件從關(OFF)狀態切換成開(ON)狀態時,其所測量之動態接通電阻(dynamic on-resistance)是等於或小於直流(DC)接通電阻的1.4倍。
在此所述之任一元件可包括多個場板。具多個場板之元件可包括下列特徵。電極定義層和蝕刻終止層可為第一電極定義層和第一蝕刻終止層,且元件更進一步包含堆疊結構,該堆疊結構位於遠離第一蝕刻終止層的第一電極定義層的對側,其中堆疊結構包含第二蝕刻終止層和第二電極定義層。在堆疊結構中形成凹部,且一部分的電極位於堆疊結構上面。第二絕緣層可位於第一電極定義層與第二蝕刻終止層之間。元件可包括第二電極,其中第二凹部形成在第二電極定義層與第二蝕刻終止層中,且第二電極可形成在第二凹部內。第二電極可電氣連接至第一電極。元件可包括複數個堆疊結構,其中在每一個堆疊結構中形成凹部,且在每一個凹部中形成電極。元件可為加強模態(enhancement-mode)元件或空乏模態(depletion-mode)元件。
在另一態樣中描述形成III-N元件的方法。該方法包括:在III-N材料層的表面上施加絕緣層。在施加絕緣層後,在絕緣層上施加蝕刻終止層。在施加蝕刻終止層後,在蝕刻終止層上施加電極定義層。蝕刻電極定義層而形成凹部,其中藉由非垂直於蝕刻終止層表面的壁面至少部分界定該凹部。蝕刻步驟使用的蝕刻劑是具選擇性的,其蝕刻電極定義層的速率比蝕刻蝕刻終止層的速率快。在凹部內和電極定義層的露出部分上沈積導電材料。
該方法之一或多個實施例可包括一或多個下列特徵。該方法包括蝕刻該蝕刻終止層,使電極定義層中的凹部延伸到絕緣層中。蝕刻該蝕刻終止層可包括溼蝕刻。蝕刻電極定義層可包括乾蝕刻或氟型乾蝕刻。用於蝕刻該蝕刻終止層的蝕刻製程,其實質上不蝕刻電極定義層或絕緣層。該蝕刻製程可以約10:1或更高之選擇率來蝕刻該蝕刻終止層。蝕刻該電極定義層可產生具角度壁面的電極定義層,該角度壁面具有至少一部分與蝕刻終止層的主要表面呈非垂直角度。該非垂直角度約為5度至約85度。用於蝕刻該電極定義層的蝕刻製程,其實質上不蝕刻該蝕刻終止層。該蝕刻製程可以約10:1或更高之選擇率來蝕刻電極定義層。
閘絕緣體一般需製作得很薄,使閘極與2DEG間維持適當耦合,且為了確保元件閾電壓和其他元件參數的再現性,因此通常必須以高度的準確性來控制閘絕緣體的厚度。特別是當需要非常薄的閘絕緣體時,在此所述之技術足以精確地控制閘絕緣體厚度,因此藉由利用此製程可再現製造。
茲描述可再現製造的半導體元件,例如高電子遷移率電晶體(HEMT)和二極體。該等元件皆包括傾斜場板,且某些元件在閘極與下層半導體層之間還包括閘絕緣體。使用傾斜場板可得到具有良好性質的元件,其用於高電壓切換應用,例如高崩潰電壓及在高電壓操作下的最小化分散,而當電晶體結構內含閘絕緣體時,則可減少閘極漏電。此外,該元件的製造製程可利用傳統半導體元件製造製程來再現。該半導體元件可為III族氮化物或III-N半導體元件,故在此所述的元件包括III-N半導體層。在此亦描述形成該元件的方法。
第5圖繪示III族氮化物元件,意即III族氮化物高電子遷移率電晶體(HEMT)。在此,「III族氮化物」或「III-N材料」、層、元件等是指包含化合物半導體材料的材料或元件,該化合物半導體材料為依據化學計量化學式AlxInyGazN,其中x+y+z約為1。元件包括基板層10,其可包括或由矽、藍寶石、氮化鎵(GaN)、氮化鋁(AlN)、碳化矽(SiC)或任何其他適用於III-N元件的基板所組成。在一些實施例中,不包括基板。舉例來說,在一些實施例中,基板已於元件製造完成前被移除。形成於基板10頂部的III-N層11、12為III-N材料,其構成高電子遷移率電晶體(HEMT)元件的基礎。III-N層11、12有不同的組成,選擇該組成使得在層11中誘導2DEG通道,該層11茲稱為「通道層11」。在層12中的一些或所有III-N材料的能量間隙是大於通道層11,故層12茲稱為「阻障層12」。在一些實施例中,通道層11為氮化鎵(GaN),且阻障層12為AlxGa1-xN,其中x為0至1。其應當理解可實施III-N材料結構的修飾,只要產生的結構可形成III-N高電子遷移率電晶體(HEMT)或其他III-N元件,例如異質接面場效電晶體(HFET)、金屬絕緣體半導體異質接面場效應電晶體(MISHFET)、金氧半導體場效電晶體(MOSFET)、金屬半導體場效電晶體(MESFET)、接面場效電晶體(JFET)、電流孔徑垂直電子電晶體(CAVET)、極化摻雜場效電晶體(POLFET)、高電子遷移率電晶體(HEMT)、場效電晶體(FET)、二極體或其它元件。舉例來說,亦可包含額外的III-N層,例如位於基板10與覆蓋基板的III-N層之間的III-N緩衝層、或位於通道層11與阻障層12間的氮化鋁層(AlN)。III-N層可定向在[0001](III-面或鎵-面C-平面)極性方向、[000](N面)極性方向、或任何其他極性、半極性或非極性方向。在某些實施例中,例如當III-N材料層被定向在[000]方向或在氮-終端半極性方向或在非極性方向時,該阻障層12係介於基板10與通道層11之間。就以上所描述,如第5圖所示,最上層III-N層(意即,離基板最遠的III-N層)為阻障層12,但在一些實施例中,最上層III-N層為通道層11或其它III-N層。
可設計該元件結構而獲得為空乏模態元件的III-N元件,因此當相對源極施加零電壓至閘極時,可在閘極區和通道層11的存取區中誘導2DEG通道19。或者,III-N元件可為加強模態元件,因此當相對源極施加零電壓至閘極時,可在存取區而非通道層11的閘極區中誘導2DEG通道19,並且必須施加正電壓至閘極,用以在通道層11的閘極區中誘導2DEG。在此,「閘極區」是指閘極16正下方的III-N材料區,意即在第5圖中的二條垂直虛線之間。用語「存取區」是指分別在閘極區的側邊和源極14與汲極15之間的元件區。因此,存取區可至少部分地位於傾斜極板28下方。
在一些實施例中,在閘極區中的III-N層結構不同於存取區的III-N層結構(未繪示)。舉例來說,存取區可包括閘極區所沒有的III-N層,反之亦然。在一些實施例中,最上層III-N層陷入閘極區(未繪示)。在最上層III-N層中的凹部部分延伸穿過該層,使得一部分的最上層III-N層於閘極區中被移除。或者,凹部可完全貫穿最上層III-N層並伸入最上層III-N層正下方的III-N層,如此全部的最上層III-N層和最上層III-N層底下的一部分該層可於閘極區中被移除。用於III-N元件的III-N層結構附加實例可參見西元2007年9月17日申請之美國專利申請案號11/856,687、西元2008年4月14日申請之美國專利申請案號12/102,340、西元2008年11月26日申請之美國專利申請案號12/324,574、西元2008年4月23日申請之美國專利申請案號12/108,449、西元2008年12月10日申請之美國專利申請案號12/332,284、西元2009年2月9日申請之美國專利申請案號12/368,248和西元2007年9月17日申請之美國專利申請案號11/856,695,其皆一併附上供作參考。
形成在閘極區對側的源極14和汲極15與通道層11中的2DEG通道19個別地接觸。閘絕緣層22與最高的III-N表面相鄰,且至少從源極14延伸到汲極15。如同第5圖所示的元件,當最上層III-N層在閘極區與存取區中為同一層時,則最上層III-N表面是指在基板10對側的最上層III-N層的表面。在一些實施例中,在閘極區中的最上層III-N層係不同於存取區的最上層III-N層,且在這些實施例中,最上層III-N表面包括最上層III-N層的所有表面,其位於在基板對面的元件側邊,其包括由在最上層III-N層之階梯、凹部或不連續所造成的任何垂直或傾斜表面。
閘絕緣層22可由任何絕緣膜所組成,為了確保有足夠的閘極電容,同時防止實質電流從閘極16經由2DEG通道19流向汲極15,該閘絕緣層可製作得很薄,例如小於約50奈米(nm),例如小於或約為22nm、18nm或15nm,。舉例來說,閘絕緣層22的厚度可約為2-50nm,並由二氧化矽(SiO2)或氮化矽(SiN)所構成,且利用諸如化學氣相沉積(CVD)、金屬有機化學氣相沉積(MOCVD)、高溫化學氣相沉積(HTCVD)、濺鍍、蒸鍍之方法、或其它適合沉積的技術來沉積。在一些實施例中,閘絕緣層22由高介電係數(高K)的介電質所組成,例如二氧化鉿(HfO2)、過氧化鈦(Ti2O5)或二氧化鋯(ZrO2)。相較於使用同樣厚度的低介電係數介電質,高K介電質將產生更大的閘極電容。因此,當使用高K介電質時,閘絕緣層22不需製作得像低介電係數介電質一樣薄。舉例來說,當使用高K介電質時,假如閘絕緣層厚度約為2000nm或以下、約為1000nm或以下、或約為500nm或以下,即可達到足夠的閘極電容。
閘絕緣層22可製作得夠厚,以避免在元件操作期間,實質外洩電流(意即,外洩電流大於約100微安)流過閘絕緣層22。舉例來說,閘絕緣層22可能需製作成厚度大於約2nm,以實質抑制外洩電流。在一些實施例中,該元件為空乏模態元件(意即,元件閾電壓小於0V),且選擇閘絕緣層22的厚度使得元件的閾電壓約為-30V或更大(意即,較小負值),例如介於約-30V至0V之間。當在閘極區之2DEG為實質耗乏電荷時(意即,電荷密度約小於元件中最大2DEG電荷密度的1%),該元件的閾電壓為最大電壓。在其他實施例中,選擇閘絕緣層22的厚度,使得該層的每單位面積電容約為0.8-40毫法拉/平方公尺。
由於閘絕緣層22直接與在元件存取區中的最上層III-N表面接觸,故其本身或結合在存取區中的覆蓋層後也能當作有效表面鈍化層,此將說明於後。在此所使用的,「鈍化層」是指生成或沉積在III-N元件中的最上層III-N層頂部的任何層或組合層,其可防止或抑制在元件操作期間,存取區中的最上層III-N表面的電壓波動。舉例來說,鈍化層可防止或抑制在最上層III-N表面的表面/界面狀態形成,或者其可防止或抑制在元件操作期間,表面/界面狀態捕集電荷的能力。
在III-N元件中,最上層III-N表面的電壓波動常因為在元件操作期間,表面狀態帶電所引起,其已知會造成不當影響,例如分散。分散是指當元件在射頻(RF)或切換條件下操作相較於當元件在直流(DC)條件下操作時所觀察到的電流-電壓(I-V)特徵差異。以有機金屬化學汽相沈積(MOCVD)來沉積之薄SiN層(如22nm)已證實可形成用於III-N元件之特效閘絕緣體,當結合適當的覆蓋層21、23後,其又可同時做為存取區之適當鈍化層,此將說明於後。
在一些實施例中,蝕刻終止層21形成於與閘絕緣層22直接相鄰的元件存取區中,在蝕刻終止層21的頂部形成電極定義層23。電極定義層23具有位於源極14與汲極15之間的凹部,意即在元件存取區之間的區域。在一些實施例中,蝕刻終止層21亦陷入此區域中。電極29共形沉積(conformally deposited)於凹部。電極29位於閘極區上方並往汲極15的方向延伸,使得一部分的電極29位於一部分的電極定義層23上面。位於閘極區上方的一部分電極29(意即,位於二垂直虛線間)為閘極16,在最靠近汲極15的一側上,與閘極16相鄰的部分電極29為傾斜場板28。在一些實施例中,往汲極15的方向延伸的部分電極29位於電極定義層23的至少一部分側壁24上面,但不覆蓋電極定義層23的非傾斜部分(未繪示)。即,往汲極15方向延伸的電極29的整個部分是容納在電極定義層23中的凹部內。在其他實施例中,電極29完全容納在電極定義層23中的凹部內且位於至少一部分的側壁24上面。
從第5圖清楚可知,傾斜場板的形狀部分地藉由凹部的形狀來定義,意即電極定義層23的側壁24的輪廓。對於在此所使用的「傾斜場板」,其至少一部分定義場板形狀的下表面的角度相對於在閘極區之最上層III-N表面約為5度至85度(如約10度至70度)。舉例來說,在第5圖中假如角度25約為5度至85度,那麼傾斜場板28則定義為傾斜場板。此外,側壁24不一定要有線性輪廓,其輪廓可為線性、拋物線或其他形狀,只要側壁24的至少一實質部分的角度相對閘極區之最上層III-N的表面約為5度至85度即可。在一些實施例中,相對於閘極區之最上層III-N表面,該定義場板形狀的下表面的實質部分角度約為30度至45度。
在最靠近源極14之閘極側的部分電極定義層23在與電極29相鄰的區域亦為傾斜,在此區域中的斜率是由角度26所定義。在此區域中的斜率可為固定不變或有所變化。在一些實施例中,角度25、26大致為相同,然在其他實施例中,二者不同。使藉由角度26來定義斜率之側壁比側壁24更傾斜,其對於降低閘極-源極電容是有利的。在一些實施例中,角度26約為45度至90度,例如約80度至90度。
為了形成具有側壁24之電極定義層23,其符合傾斜場板形成所需規格,同時容許十分精確地控制閘極16底下區域的閘絕緣層22的厚度,可採取以下製造程序。在一連串的III-N層上沉積或生成閘絕緣層22後,沉積蝕刻終止層21使其覆蓋整個結構,其後在各處沉積電極定義層23使其覆蓋該蝕刻終止層21。接著,採行具下列性質之蝕刻製程來移除位於閘極區上方的一部分電極定義層23材料。該蝕刻製程蝕刻電極定義層23之材料並產生側壁(如上述的側壁24),但不實質蝕刻該蝕刻終止層21之材料。在一些實施例中,蝕刻製程以實質上比蝕刻該蝕刻終止層21之材料快的速率來蝕刻電極定義層23之材料,例如至少快約10倍、或快約10至10000倍。換言之,蝕刻製程以約10:1或更高之選擇率來蝕刻電極定義層23。在一實施例中,該蝕刻製程為乾蝕刻,例如反應離子蝕刻(RIE)或感應耦合電漿蝕刻(ICP),其中蝕刻遮罩包括二層光阻,意即雙層光阻製程,在未遮蔽區域中,下光阻層底切(undercut)該上光阻層。此製程的完整敘述可參見Dora等人於IEEE Electron Device Letters,Vol 27,No 9,pp 713-715發表之文章「在具整合式傾斜場板之AlGaN/GaN高電子遷移率電晶體上達到高崩潰電壓(HIGH BREAKDOWN VOLTAGE ACHIEVED ON ALGAN/GAN HEMTS WITH INTEGRATED SLANT FIELD PLATES)」,其一併附上供作參考。在另一實施例中,該蝕刻製程為乾蝕刻,例如反應離子蝕刻(RIE)或感應耦合電漿蝕刻(ICP),其中做為蝕刻遮罩的光阻具有傾斜側壁,且亦可被所採用之乾蝕刻技術蝕刻。
接著,採行具下列性質之第二蝕刻製程來移除位於閘極區上方的部分蝕刻終止層21材料。第二蝕刻製程蝕刻該蝕刻終止層21之材料,但不實質蝕刻該閘絕緣層22之材料。第二蝕刻製程可以實質上比蝕刻閘絕緣層22之材料快的速率來蝕刻該蝕刻終止層21之材料,例如至少快約10倍、或快約10至10000倍。在一些實施例中,第二蝕刻製程實質上亦無法蝕刻電極定義層23之材料。
蝕刻終止層21可由絕緣材料所構成,例如AlN、SiN、SiO2或其他絕緣材料,其有不同組成、或為不同於閘絕緣層22的材料。不同材料或組成可讓蝕刻步驟具選擇性。更明確地說,蝕刻終止層21可由以下所描述的材料所組成:在蝕刻製程中可蝕刻該蝕刻終止層21但又不實質蝕刻任何閘絕緣層22之材料。舉例來說,因為氫氧化鉀(KOH)基溼蝕刻其可用來蝕刻AlN,但實質上不蝕刻SiN,所以當閘絕緣層22由SiN所組成時,蝕刻終止層21可由AlN所組成。另外,若蝕刻終止層21很薄,例如小於約15nm(如約5nm),則可防止蝕刻終止層21遭實質側向蝕刻。側向蝕刻會在電極定義層23底下與閘極16相鄰的區域產生底切。若在此區域出現底切,其可能造成在底切正下方的區域將無法足夠鈍化該最上層III-N的表面,因而造成不當影響,例如分散。在一些實施例中,蝕刻終止層21藉由濺鍍沉積之AlN所組成且其厚度約為5nm。
電極定義層23由絕緣材料所組成,例如AlN、SiN或SiO2,其有不同組成、或為不同於蝕刻終止層21的材料。不同材料或組成可讓蝕刻步驟具選擇性。更明確地說,電極定義層23可由以下所描述的材料所組成:在蝕刻製程中可蝕刻電極定義層23並形成如上所述側壁24之側壁,同時不實質蝕刻該蝕刻終止層21之材料。舉例來說,因為氟基乾蝕刻其可蝕刻SiN,但實質上不蝕刻AlN,所以當蝕刻終止層21由AlN所組成時,電極定義層23可由SiN所組成,並且如前所述,當使用適當光阻蝕刻遮罩時,可形成如上所述側壁24之側壁。此外,為了有效降低由傾斜場板所產生的峰值電場,電極定義層23的厚度可約為100nm或更厚,例如約100nm至200nm,例如約120nm。電極定義層23的最佳厚度是部分取決於在電路或模組中所採用的元件操作電壓。舉例來說,若採用較高的操作電壓,則最好有較厚的電極定義層23,例如約200nm至2000nm。在一些實施例中,電極定義層23藉由以電漿輔助化學氣相沉積(PECVD)所沉積之SiN來組成且其厚度約為120nm。
結合閘絕緣層22、蝕刻終止層21與電極定義層23可在元件存取區中構成適合之鈍化層。與最上層III-N表面相鄰的閘絕緣層22可防止或抑制在最上層III-N表面的表面/界面狀態形成,或者其可防止或抑制在元件操作期間,表面/界面狀態捕集電荷的能力。為適當防止或抑制藉由在最上層III-N表面之表面/界面狀態所引起的分散,閘絕緣層22的厚度需達約2nm或更厚。然而,使閘絕緣層22變厚會降低元件的互導(transconductance),進而降低元件性能。
為避免在蝕刻終止層21對側之電極定義層23表面上的電壓波動造成實質分散,電極定義層23與閘絕緣層22的合併厚度需足夠厚,例如約100nm或更厚。電極定義層23與閘絕緣層22實質上可抑制分散所需的最小合併厚度是取決於元件操作電壓(意即,在操作期間,源極與汲極間的最大電壓差)。舉例來說,就高達約50V的操作而言,合併厚度可約為120nm或更厚;就高達約300V的操作而言,合併厚度可約為800nm或更厚;以及就高達約600V的操作而言,合併厚度可約為1800nm或更厚。由於期望閘絕緣層22的厚度很小,例如約20nm,因此電極定義層23的厚度幾乎或大致和此二層的最小合併厚度一樣。因為單獨的較厚層難以製造,故需形成附加層,以達到在高操作電壓下可實質抑制分散所需的最小合併層厚度。此元件繪示於第12a及13圖,且將進一步說明於後。
在傳統III-N元件中,在許多情況下,厚度大於約30nm之SiN單層(即未與蝕刻終止層或電極定義層結合的單一層)已證實適合當作鈍化層。在高元件操作電壓下,相較於較薄的SiN單層,較厚的SiN單層可改善鈍化或有效鈍化。至於第5圖的元件,就高達約50V的元件操作而言,當使用以有機金屬化學汽相沈積(MOCVD)所生成之2-20nm的SiN層做為閘絕緣層22、使用以濺鍍沉積之1-15hm的AlN層做為蝕刻終止層21、和使用以電漿輔助化學汽相沈積(PECVD)所沉積之100-200nm的SiN層做為電極定義層23時,其已證實可達到適當的鈍化效果。此亦顯示增加蝕刻終止層21的厚度將導致元件遭受更大分散,以致降低元件性能。舉例來說,元件製造唯一改變的參數為AlN蝕刻終止層21的厚度。這些元件因AlN蝕刻終止層21的厚度增加而呈現更大分散。
具有傾斜場板與閘絕緣體的III-N元件亦可省略第5圖的蝕刻終止層21來實施,並選擇作為可藉由蝕刻製程而被蝕刻的電極定義層23之材料,該蝕刻製程可選擇性的蝕刻電極定義層23的材料,而不實質蝕刻閘絕緣層22之材料。然而,第5圖的結構比此結構有利,因為其難以找到適合做為III-N元件之閘絕緣體,同時又可當作電極定義層23材料之蝕刻終止層,並且又同時能結合電極定義層23的材料做為適合鈍化層的閘絕緣層22的材料。
形成第5圖元件的方法繪示於第6-11圖。參照第6圖,將至少包括通道層11和阻障層12的一連串III-N層形成在基板10上,而於通道層11中構成2DEG 19。III-N層可利用諸如有機金屬化學汽相沈積(MOCVD)、分子束磊晶(MBE)、氫化物氣相磊晶(HVPE)之方法、或其他方法來磊晶成長。接著,參見第7圖,在一連串III-N層的頂部上形成閘絕緣層22。閘絕緣層22可利用諸如有機金屬化學汽相沈積(MOCVD)、電漿輔助化學汽相沈積(PECVD)、高溫化學汽相沈積(HTCVD)、濺鍍、蒸鍍之方法、或其他方法來生成或沉積。在一些實施例中,閘絕緣層22是以與III-N層相仿或相同的方法來形成,且可在同一步驟中形成。舉例來說,III-N層和閘絕緣層22皆可利用有機金屬化學汽相沈積(MOCVD)來沉積或生成。
接著,參照第8圖,分別在包含源極14與汲極15之區域中將閘絕緣層22移除,以及利用諸如蒸鍍、濺鍍、電漿輔助化學汽相沈積(PECVD)、高溫化學汽相沈積(HTCVD)之方法、或其他方法來形成與2DEG 19接觸的源極14與汲極15。在一些實施例中,源極14與汲極15是在形成閘絕緣層22之前形成。
參照第9圖,接著在閘絕緣層22上方形成蝕刻終止層21,在蝕刻終止層21上形成電極定義層23。接著,參見第10圖,將蝕刻遮罩17(如光阻)沉積在所示區域的電極定義層23上,並且利用蝕刻電極定義層23之材料,但不實質蝕刻該蝕刻終止層21之材料的技術來蝕刻未遮蔽區域的電極定義層23。此蝕刻可於蝕刻區域中形成傾斜側壁24。因此,該蝕刻可精確地停止在電極定義層23與蝕刻終止層21的界面。參照第11圖,移除蝕刻遮罩17,以及利用蝕刻該蝕刻終止層21之材料,但不實質蝕刻電極定義層23或閘絕緣層22之材料的技術來蝕刻在閘極區中的蝕刻終止層21。該蝕刻終止層具有主要表面,該主要表面為接合電極定義層且當蝕穿電極定義層時所露出的表面。故蝕刻可精確地停止在蝕刻終止層21與閘絕緣層22的界面上。最後,形成電極29,其包括閘極16和傾斜場板28,藉以完成第5圖所示元件。
在第5圖元件之一實施例中,III-N層和閘絕緣層22皆利用有機金屬化學汽相沈積(MOCVD)來生成,並以單一成長步驟來形成。閘絕緣層22包括或由SiN所組成且其厚度約為22nm。蝕刻終止層21包括或由AlN所組成,其利用蒸鍍或濺鍍來沉積且其厚度約為5nm。電極定義層23包括或由SiN所組成,其利用電漿輔助化學汽相沈積(PECVD)來沉積且其厚度約為120nm。如第10圖所示,蝕刻遮罩17為光阻,並經圖案化使得該側壁為實質傾斜。或者,該蝕刻遮罩可為雙層光阻,其中下光阻層相對上光阻層呈底切結構。在閘極區中的電極定義層23是利用氟基乾蝕刻來移除,例如反應離子蝕刻(RIE)或感應耦合電漿蝕刻(ICP),其可蝕刻SiN,但不實質蝕刻AlN,故當使用具實質傾斜側壁之光阻或雙層光阻做為蝕刻遮罩時,可形成如上所述第5圖側壁24之側壁。在閘極區中的蝕刻終止層21是利用KOH基溼蝕刻移除,其可蝕刻AlN、但不實質蝕刻SiN。
茲已製造如第5圖中具有單一場板之元件,其動態接通電阻(以高達40V之源極-汲極偏壓將元件從OFF狀態切換成ON狀態時所測量)不超過DC接通電阻(RON)的1.2倍。當飽和電流為50mA/mm時,平均DC RON約為11.5歐姆-釐米(Ω-mm),而以40V之源極-汲極偏壓切換元件時測量之平均動態RON約為11.9歐姆-釐米。在做為切換應用的半導體電晶體中,分散會導致元件的動態接通電阻提高。在無傾斜場板的元件中,例如第5圖元件,分散會造成動態接通電阻太高而不適合元件應用。第5圖元件的分散可保持夠小,意即實質抑制該分散,因此使動態接通電阻可為元件應用所接受。
第12a圖為元件的示意圖,其包括閘絕緣體和兩個傾斜場板。第12a圖的元件與第5圖的元件相同,但其更包括絕緣層32、第二蝕刻終止層31、第二電極定義層33和包括第二傾斜場板38的電極39。相較於第5圖元件,額外的第二傾斜場板38更可降低在元件操作期間的元件峰值電場,因此更進一步提高元件的崩潰電壓及減少分散、或在比第5圖元件可行電壓更高的電壓下產生足夠小的分散。
第二電極定義層33和第二蝕刻終止層31分別類似電極定義層23和蝕刻終止層21。即,第二電極定義層33可由絕緣材料所組成,例如AlN、SiN或SiO2,其有不同組成、或為不同於第二蝕刻終止層31的材料。此外,第二電極定義層33可包含以下所述材料:在蝕刻製程中可蝕刻電極定義層33並形成如上所述第5圖側壁24之側壁,且又不實質蝕刻第二蝕刻終止層31之材料。舉例來說,因為氟基乾蝕刻可蝕刻SiN,但實質上不蝕刻AlN,所以當第二蝕刻終止層31為AlN時,第二電極定義層33可為SiN,且當採用適當光阻蝕刻遮罩時,可形成如上述第5圖側壁24之側壁。在一些實施例中,第二電極定義層33的厚度約為10nm至1000nm,例如約500nm。在一些實施例中,第二電極定義層33藉由以電漿輔助化學氣相沉積(PECVD)所沉積之SiN來組成且其厚度約為500nm。
第二蝕刻終止層31可由絕緣材料所組成,例如AlN、SiN或SiO2,其有不同組成、或為不同於底下絕緣層32和不同於第二電極定義層33的材料。第二蝕刻終止層31可包含以下所述材料:在蝕刻製程中可蝕刻該蝕刻終止層31之材料,但又不實質蝕刻任何底下絕緣層32或第二電極定義層33之材料。舉例來說,因為KOH基溼蝕刻實質上不蝕刻SiN,但可用來蝕刻AlN,所以當底下絕緣層32和第二電極定義層33為SiN時,第二蝕刻終止層31可為AlN。另外,為了防止第二蝕刻終止層31遭實質側向蝕刻而在第二電極定義層33底下產生底切,該第二蝕刻終止層31可以很薄,例如小於約15nm(如約5nm)。在一些實施例中,第二蝕刻終止層31藉由以濺鍍沉積之AlN所組成且其厚度約為5nm。
在第12a圖的元件中形成電極39和相鄰層的方法與上述在第5圖的元件中形成電極29和相鄰層的方法相仿或相同。此外,電極39和電極29(為便於說明,其標繪於第5圖,但未標繪於第12a圖)可從外部或在元件周邊上電氣連接,如此第二傾斜場板38為閘極連接場板(未繪示)。在此,假如兩個或多個觸點或其他項目藉由足夠導電之材料連接,該材料可確保在各觸點或其他項目的電位在所有時候為相同(意即大致相同),該兩個或多個觸點或其他項目則稱為「電氣連接」。另外,此元件可利用與上述電極39和相鄰層相仿或相同的製程和結構來增設附加傾斜場板,其亦可為閘極連接場板。
絕緣層32(其可為SiN)隔開電極39和電極29,並在蝕刻第二蝕刻終止層31時,保護電極29不被破壞。在一些實施例中,不包含絕緣層32,在此例子中電極39直接與在主動元件區中的電極29連接。
繪示在第12a圖的元件之一實施例中,III-N層和閘絕緣層22皆利用有機金屬化學汽相沈積(MOCVD)來生成,並以單一成長步驟形成。閘絕緣層22為SiN且其厚度約為22nm。蝕刻終止層21包括或由AlN組成,其利用蒸鍍或濺鍍來沉積且其厚度約為5nm。電極定義層23為SiN,其利用電漿輔助化學汽相沈積(PECVD)來沉積且其厚度約為120nm。如第10圖所示,蝕刻遮罩17是由光阻所組成,並經圖案化使側壁呈實質傾斜或具底切結構,藉以在底下電極定義層23中定義具傾斜側壁之溝槽。在閘極區中利用氟基乾蝕刻(例如反應離子蝕刻(RIE)或感應耦合電漿蝕刻(ICP),其可蝕刻SiN,但不實質蝕刻AlN)來移除電極定義層23,故當採用適當光阻蝕刻遮罩時,可形成如上述第5圖側壁24之側壁。在閘極區中利用KOH基溼蝕刻(其可蝕刻AlN、但不實質蝕刻SiN)來移除蝕刻終止層21。絕緣層32為以電漿輔助化學汽相沈積(PECVD)所沉積之SiN且其厚度約為200nm。第二蝕刻終止層31為以蒸鍍或濺鍍所沉積之AlN且其厚度約為5nm。第二電極定義層33為以電漿輔助化學汽相沈積(PECVD)所沉積之SiN且其厚度約為500nm。第二電極定義層是利用氟基乾蝕刻來蝕刻,例如反應離子蝕刻(RIE)或感應耦合電漿蝕刻(ICP),其蝕刻SiN,但不實質蝕刻AlN,且當採用適當光阻蝕刻遮罩時,可形成如上述第5圖側壁24之側壁。第二蝕刻終止層31是利用KOH基溼蝕刻來蝕刻,其蝕刻AlN,但不實質蝕刻SiN。
茲已製造如第12a圖中具有兩個傾斜場板之元件,其動態接通電阻(以高達200V之源極-汲極偏壓將元件從OFF狀態切換成ON狀態時所測量)不超過DC接通電阻(RON)的1.2倍。當飽和電流為50mA/mm時,平均DC RON約為11.5歐姆-釐米,而以200V之源極-汲極偏壓切換元件時所測量之平均動態RON亦約為11.5歐姆-釐米。在做為切換應用的半導體電晶體中,分散會導致元件的動態接通電阻提高。在不具有多個傾斜場板的元件中,例如第12a圖中的元件,分散會造成動態接通電阻太高而不適合元件應用。在第12a圖元件中的分散可保持夠小,意即可實質抑制分散,因此使動態接通電阻可為元件應用所接受。
茲已製造類似第12a圖、但具有三個傾斜場板之元件,其動態接通電阻(以高達600V之源極-汲極偏壓將元件從OFF狀態切換成ON狀態時所測量)不超過DC接通電阻(RON)的1.2倍。第12b圖為顯示這些元件之平均RON對應汲極電壓(Vd)的曲線圖。這些元件的平均DC RON約為170毫歐姆(mΩ),而以600V之源極-汲極偏壓將元件從OFF狀態切換成ON狀態時測量之平均動態RON為約200毫歐姆。
茲已製造類似第12a圖,但具有四個傾斜場板之元件,其動態接通電阻(以高達800V之源極-汲極偏壓將元件從OFF狀態切換成ON狀態時所測量)不超過DC接通電阻(RON)的1.4倍。第12c圖為顯示這些元件之平均RON對應汲極電壓(Vd)的曲線圖。這些元件的平均DC RON約為1000毫歐姆,然而當以800V之源極-汲極偏壓將元件從OFF狀態切換成ON狀態時測量之平均動態RON為約1400毫歐姆。
第13圖顯示另一元件,其包括閘絕緣層22和兩個傾斜場板28及38。此元件類似第12圖中的元件,除了在主動元件區中兩個傾斜場板28及38是互相連接,並由單一金屬沉積而構成。舉例來說,包括元件閘極16與傾斜場板28、38的電極49可以單一步驟來沉積。因為可簡化製造製程及降低閘極電阻,所以此元件比第12a圖中的元件更具優勢。
在第13圖元件中的電極49和與電極49相鄰之層可依下述方法來形成。閘絕緣層22、第一蝕刻終止層21、第一電極定義層23、第二蝕刻終止層31和第二電極定義層33皆沉積在主動半導體元件層上。如前所述,接著在層33的頂部將蝕刻遮罩(如光阻)圖案化,及利用不蝕刻層31之材料並在層33內形成傾斜側壁的蝕刻製程於層33內形成開口。接著利用可蝕刻層31之材料,但不蝕刻層33或層23之材料的蝕刻製程來蝕刻該層31鄰接開口的部分。在蝕刻層33之前或之後,將沉積於層33頂部的圖案化蝕刻遮罩移除。接著,將第二蝕刻遮罩(如光阻)沉積在元件上,使得層33、31之露出表面和區域59外側露出的層23部分被蝕刻遮罩材料所覆蓋,但蝕刻遮罩材料不覆蓋在區域59內露出的層23部分。如前所述,接著利用不蝕刻層21之材料並在層23內形成傾斜側壁的蝕刻製程來蝕刻層23而形成開口。最後,移除第二蝕刻遮罩,及利用可蝕刻層21之材料,但不蝕刻層22或層23之材料的蝕刻製程來蝕刻層21鄰接層23內的開口的部分。
包括傾斜場板28之二極體繪示於第14及15圖中,其中第14圖為元件的截面圖,第15圖為元件的平面圖。第15圖中的平面圖顯示陽極觸點61與陰極觸點60各自的佈局。雖然陽極與陰極觸點在第15圖中呈圓形,但其通常可為任何適用電路佈局的形狀。該二極體包括III-N通道層11和阻障層12,其含有2DEG通道19且類似第5圖元件的III-N層。陽極觸點61由單一電極或複數個電極所組成,且直接接觸底下半導體材料。陰極觸點60接觸2DEG通道19,並緊鄰至少一部分的陽極觸點61。陰極觸點60為歐姆觸點、或實質展現歐姆行為,以及陽極觸點61為蕭特基觸點、或形成連接至底下III-N層的實質蕭特基觸點。陰極觸點60可為單一陰極觸點。在此,該用語「單一陰極觸點」是指當作陰極的單一金屬觸點、或做為多個陰極的複數個觸點,其電氣連接使得各觸點的電位大致相同。陽極觸點61與陰極觸點60可具任何任意形狀,然而該形狀必須經理想最佳化來減少特定順向電流(forward current)所需的元件面積。
介電層62由絕緣體或介電質所組成,且在元件存取區中與最上層III-N的表面相鄰。介電層62本身或結合在存取區中之覆蓋層後能當作有效表面鈍化層。層21為蝕刻終止層,以及層23為電極定義層,其要求分別與第5圖元件的蝕刻終止層和電極定義層類似或相同。
第14及15圖之二極體依下述來操作。當在陽極觸點61的電壓小於陰極觸點60的電壓,使得陽極觸點61與III-N層12間的蕭特基接面為逆向偏壓時,二極體處於OFF狀態,且陽極與陰極之間無實質電流流動。當在陽極觸點61的電壓大於陰極觸點60的電壓,使得陽極觸點61與III-N層12間的蕭特基接面為順向偏壓時,二極體處於ON狀態。電子主要從陰極觸點60流經2DEG通道19,然後流過順向偏壓之蕭特基接面而至陽極觸點61。即,至少99%的總順向偏壓電流從陽極經由蕭特基阻障層與2DEG通道流向陰極。具有少量外洩電流可流經其他路徑,例如沿著元件表面。
第16圖中的元件類似第14圖的元件,除了在陽極區64中,III-N材料凹陷貫穿III-N阻障層12並部分穿過III-N通道層11,使凹部延伸穿過包含2DEG的區域。在此情況下,陽極觸點61構成實質蕭特基觸點至其直接接觸的一些或所有III-N層。在一些實施例中,凹部只部分延伸穿過III-N層12,且不延伸貫穿包含2DEG通道的區域(未繪示)。在逆向偏壓操作期間,在陽極觸點部分66正下方的2DEG通道19部分(意即,介電層62正上方且與介電層62相鄰的陽極觸點部分)可為耗乏電子,藉以減少在元件中的逆向外洩電流。在陽極觸點部分66正下方的2DEG通道19部分為在元件存取區中的2DEG通道部分,意即介於陽極區64與陰極觸點60之間的區域,且侷限於與陽極區64相鄰的區域。在逆向偏壓操作期間,為了使陽極觸點部分66正下方的2DEG通道19部分變得耗乏電子,介電層62不能太厚。在一些實施例中,介電層62為氮化矽且其厚度小於約50nm,例如約2nm至50nm。介電層62可製作得足夠厚,以避免實質外洩電流(意即外洩電流大於約100微安/微米)從陽極經由在陽極觸點部分66正下方區域之介電層62流向陰極。舉例來說,介電層62可能需製作成厚度大於約2nm,以實質抑制外洩電流。在一些實施例中,選擇介電層62的厚度,使得在陽極觸點部分66正下方區域的元件的閾電壓約為-15V或更大(即較小負值或較大正值),例如介於約-15V至-1V之間。,當在陽極觸點部分66正下方區域之2DEG為實質耗乏電荷時(即電荷密度小於元件中最大2DEG電荷密度的約1%),該陽極觸點部分66正下方區域的閾電壓為最大電壓。在其他實施例中,選擇閘絕緣層22的厚度使該層的每單位面積電容約為0.8-40毫法拉/平方公尺。在一些實施例中,介電層62為SiN,並以金屬有機化學氣相沉積(MOCVD)來沉積之。
若介電層62為比氮化矽更高介電係數的介電質,則介電層可製作得更厚。舉例來說,藉由使用高介電係數的介電質做為介電層62,其可製作得比設計讓此區域得到同樣閾電壓的SiN層還厚,即可能使陽極觸點部分66正下方區域達到預定閾電壓。
其他已知有益於元件性能的特徵結構也可包含在第5、12a及13-16圖的結構中。其包含但不以此為限,將在閘極及/或存取區的III-N層進行表面處理、或在通道層11與基板10之間設置III-N緩衝層,例如具有比通道層11大的能量間隙的III-N層。該半導體層不必然為III-N層,而是由其他半導體材料所組成。場板不必然為傾斜場板,而是其他類型的場板。這些特徵結構可個別或互相結合使用。
10...基板
11...通道層/III-N層
12...阻障層/III-N層
13...絕緣層
14...源極
15...汲極
16...閘極
17...遮罩
18、28、38...場板
19...2DEG通道
21、31...蝕刻終止層
22...閘絕緣層
23、33...電極定義層
24...側壁
25、26...角度
29、39、49...電極
32...絕緣層
59...區域
60、61...觸點
62...介電層
64...陽極區
66...觸點部分
第1-4圖為先前技術之III-N高電子遷移率電晶體(HEMT)元件的截面示意圖。
第5圖為含有閘絕緣體與傾斜場板之III-N半導體電晶體的截面示意圖。
第6-11圖繪示形成第5圖的III-N半導體電晶體的方法。
第12a圖為含有閘絕緣體與傾斜場板之III-N半導體電晶體的截面示意圖。
第12b及12c圖為顯示III-N半導體電晶體之接通電阻對應汲極電壓的曲線圖。
第13圖為含有閘絕緣體與傾斜場板之III-N半導體電晶體的截面示意圖。
第14及15圖分別為含有傾斜場板之III-N半導體二極體的截面圖和平面圖。
第16圖為含有傾斜場板之III-N半導體二極體的截面示意圖。
各圖中相同的元件符號代表相同的元件。
10...基板
11...通道層
12...阻障層
14...源極
15...汲極
16...閘極
19...2DGE通道
21...蝕刻終止層
22...閘絕緣層
23...電極定義層
24...側壁
25、26...角度
28...場板
29...電極

Claims (58)

  1. 一種III族氮化物(III-N)元件,其包含:一III-N材料層;一絕緣層,其位於該III-N材料層之一表面上;一蝕刻終止層,其位於遠離該III-N材料層的該絕緣層之一對側;一電極定義層,其位於遠離該絕緣層、遠離該蝕刻終止層的該蝕刻終止層之一對側,其中該電極定義層和該蝕刻終止層是一第一電極定義層和一第一蝕刻終止層;一堆疊結構,其位於遠離該第一蝕刻終止層的該第一電極定義層之一對側,其中該堆疊結構包含一第二蝕刻終止層和一第二電極定義層;以及一電極,其中在該電極定義層中形成一凹部,且在該凹部中形成該電極。
  2. 如申請專利範圍第1項之元件,其中在該堆疊結構中形成該凹部,以及該電極之一部分是在遠離該第一電極定義層之該堆疊結構的一對側之上。
  3. 如申請專利範圍第1項之元件,進一步包含一第二絕緣層,位在該第一電極定義層和該第二蝕刻終止層之間。
  4. 如申請專利範圍第3項之元件,進一步包含一第二電 極,其中在該第二電極定義層中形成一第二凹部,且在該第二凹部中形成該第二電極。
  5. 如申請專利範圍第4項之元件,其中該第二電極與該第一電極電氣接觸。
  6. 如申請專利範圍第1項之元件,進一步包含複數個堆疊結構,其中在各堆疊結構中形成一凹部,且在各凹部中形成一電極。
  7. 如申請專利範圍第1至6項中任一項之元件,其中該電極包括一場板。
  8. 如申請專利範圍第7項之元件,其中該場板是一傾斜場板。
  9. 如申請專利範圍第1至6項中任一項之元件,其中該電極定義層中之該凹部的一部分具有多個角度壁面,該角度壁面至少一部分與該蝕刻終止層的一主要表面呈一非垂直角度,該多個角度壁面定義一傾斜場板。
  10. 如申請專利範圍第9項之元件,其中該非垂直角度是介於約5度至約85度之間。
  11. 如申請專利範圍第1至6項中任一項之元件,其中該絕緣層為一鈍化層。
  12. 如申請專利範圍第1至6項中任一項之元件,其中該絕緣層是由氧化物或氮化物所形成。
  13. 如申請專利範圍第12項之元件,其中該絕緣層的厚度約為2-50奈米。
  14. 如申請專利範圍第1至6項中任一項之元件,其中該絕緣層的每單位面積電容約為0.8-40毫法拉/平方公尺。
  15. 如申請專利範圍第1至6項中任一項之元件,其中該電極定義層是由氧化物或氮化物所形成。
  16. 如申請專利範圍第15項之元件,其中該電極定義層的厚度至少約為100奈米。
  17. 如申請專利範圍第1項之元件,其中該絕緣層與該電極定義層的一合併厚度是足以實質抑制分散。
  18. 如申請專利範圍第1至6項中任一項之元件,其中該蝕刻終止層的厚度是介於約1奈米至約15奈米之間。
  19. 如申請專利範圍第18項之元件,其中該蝕刻終止層是由氮化鋁所形成。
  20. 如申請專利範圍第1至6項中任一項之元件,其中該電極定義層和該蝕刻終止層是由不同材料所形成的。
  21. 如申請專利範圍第1至6項中任一項之元件,其中該蝕刻終止層和該絕緣層是由不同材料所形成的。
  22. 如申請專利範圍第1至6項中任一項之元件,其中該凹部是形成在該蝕刻終止層中。
  23. 如申請專利範圍第22項之元件,其中該凹部是形成在該絕緣層中。
  24. 如申請專利範圍第23項之元件,其中該III-N材料層的一第一部分具有一第一組成,該III-N材料層的一第二部分具有一第二組成,其中該第一組成與該第二組成間的一差異在該III-N材料層中形成二維電子氣體(2DEG)通道。
  25. 如申請專利範圍第24項之元件,進一步包含一陰極,其中該電極的一部分為一陽極,該陽極構成一實質 蕭特基(Schottky)觸點至該III-N材料層,以及該陰極與該2DEG通道電氣接觸。
  26. 如申請專利範圍第25項之元件,其中該凹部延伸至該III-N材料層中,且該電極位於該III-N材料層中該凹部的一部分內。
  27. 如申請專利範圍第26項之元件,其中該凹部延伸穿過該2DEG通道。
  28. 如申請專利範圍第27項之元件,其中該元件之一第一區的一閾電壓大於約-15伏特(V),其中該第一區包含該元件的一部分,該元件的一部分是介於一陽極區與該陰極之間並與該陽極區相鄰。
  29. 如申請專利範圍第27項之元件,其中該絕緣層的厚度是足以防止在元件操作期間,大於約10微安/毫米的外洩電流通過該絕緣層。
  30. 如申請專利範圍第1至6項中任一項之元件,其中該III-N材料層的一第一部分具有一第一組成,該III-N材料層的一第二部分具有一第二組成,其中該第一組成與該第二組成間的一差異在該III-N材料層中形成一2DEG通道。
  31. 如申請專利範圍第30項之元件,進一步包含一源極和一汲極,其中該電極的一部分為一閘極,且該源極和該汲極與該2DEG通道電氣接觸。
  32. 如申請專利範圍第31項之元件,其中一元件閾電壓係大於約-30伏特。
  33. 如申請專利範圍第32項之元件,其中該絕緣層的一厚度係使得該元件閾電壓大於約-30伏特。
  34. 如申請專利範圍第32項之元件,其中該絕緣層的一厚度是足以在元件操作期間,避免大於約100微安的外洩電流通過該絕緣層。
  35. 如申請專利範圍第1至6項中任一項之元件,其中該元件為一場效電晶體(FET),且當以800伏特或以下之一源極-汲極偏壓,將元件從關(OFF)狀態切換成開(ON)狀態時,所測量之一動態接通電阻為等於或小於一直流(DC)接通電阻的1.4倍。
  36. 如申請專利範圍第1至6項中任一項之元件,其中該電極為一閘電極,且該元件進一步包含一源極和一汲極。
  37. 如申請專利範圍第1至6項中任一項之元件,其中該電極為一陽極電極,且該元件進一步包含一陰極。
  38. 如申請專利範圍第1至6項中任一項之元件,其中該凹部包括一第一側壁和一第二側壁,該第一側壁位於遠離該第二側壁的該凹部之一對側,該第一和第二側壁各自從該電極定義層之一第一表面延伸至該電極定義層之一第二表面,該第一表面相鄰於該蝕刻終止層,且該第二表面相對於該第一表面,該蝕刻終止層之一表面與相鄰於該蝕刻終止層之該第一側壁的一部分之間形成一第一角度,該蝕刻終止層之該表面與相鄰於該蝕刻終止層之該第二側壁的一部分之間形成一第二角度,其中該第一角度大於該第二角度。
  39. 如申請專利範圍第38項之元件,其中該電極是一閘電極,該閘電極形成在該第一和第二側壁上。
  40. 如申請專利範圍第39項之元件,進一步包含在該凹部之相對側上形成一源極和一汲極,其中該源極接近於該第一側壁,而該汲極接近於該第二側壁。
  41. 如申請專利範圍第1至6項中任一項之元件,其中當以600伏特或以下之一源極-汲極偏壓,將元件從關狀 態切換成開狀態時,所測量之一動態接通電阻為不大於一直流接通電阻的1.2倍。
  42. 一種形成一元件的方法,其包含以下步驟:在一III-N材料層的一表面上施加一絕緣層;在施加該絕緣層後,在該絕緣層上施加一蝕刻終止層;在施加該蝕刻終止層後,在該蝕刻終止層上施加一電極定義層;蝕刻該電極定義層而形成一凹部,其中該蝕刻步驟使用具選擇性之一蝕刻劑,其蝕刻該電極定義層的一速率比蝕刻該蝕刻終止層的一速率快;以及在該凹部內和該電極定義層的一露出部分上沉積一導電材料。
  43. 如申請專利範圍第42項之方法,其中該電極定義層和該蝕刻終止層為一第一電極定義層和一第一蝕刻終止層,該方法進一步包含形成一堆疊結構,其位於遠離該第一蝕刻終止層的該第一電極定義層之一對側,其中該堆疊結構包含一第二蝕刻終止層和一第二電極定義層。
  44. 如申請專利範圍第43項之方法,其中該凹部形成於該堆疊結構中,且該電極的一部分位於遠離該第一電極定義層的該堆疊結構之一對側。
  45. 如申請專利範圍第43項之方法,進一步包含形成一第二絕緣層,其位於該第一電極定義層與該第二蝕刻終止層之間。
  46. 如申請專利範圍第45項之方法,進一步包含形成一第二電極,其中在該第二電極定義層中形成一第二凹部,且在該第二凹部內形成該第二電極。
  47. 如申請專利範圍第46項之方法,其中該第二電極與該第一電極電氣接觸。
  48. 如申請專利範圍第43項之方法,進一步包含形成複數個堆疊結構,其中在各堆疊結構中形成一凹部,且在各凹部中形成一電極。
  49. 如申請專利範圍第42至48項中任一項之方法,進一步包含蝕刻該蝕刻終止層,使得在該電極定義層中的該凹部延伸到該絕緣層。
  50. 如申請專利範圍第49項之方法,其中蝕刻該蝕刻終止層之步驟包含溼蝕刻。
  51. 如申請專利範圍第49項之方法,其中用於蝕刻該蝕 刻終止層的一蝕刻製程,其實質上不蝕刻該電極定義層或該絕緣層。
  52. 如申請專利範圍第51項之方法,其中該蝕刻製程以與該絕緣層相比約為10:1或更高之一選擇率來蝕刻該蝕刻終止層。
  53. 如申請專利範圍第42至48項中任一項之方法,其中蝕刻該電極定義層之步驟包含乾蝕刻。
  54. 如申請專利範圍第53項之方法,其中蝕刻該電極定義層之步驟包含應用一氟基乾蝕刻。
  55. 如申請專利範圍第42至48項中任一項之方法,其中蝕刻該電極定義層將產生具有多個角度壁面的該電極定義層,該角度壁面至少一部分與該蝕刻終止層的一主要表面呈一非垂直角度。
  56. 如申請專利範圍第55項之方法,其中該非垂直角度是介於約5度至約85度之間。
  57. 如申請專利範圍第42至48項中任一項之方法,其中用於蝕刻該電極定義層的一蝕刻製程,其實質上不蝕刻該蝕刻終止層。
  58. 如申請專利範圍第57項之方法,其中該蝕刻製程以與該蝕刻終止層相比約為10:1或更高之一選擇率來蝕刻該電極定義層。
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Families Citing this family (158)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7915643B2 (en) 2007-09-17 2011-03-29 Transphorm Inc. Enhancement mode gallium nitride power devices
US7965126B2 (en) 2008-02-12 2011-06-21 Transphorm Inc. Bridge circuits and their components
US8519438B2 (en) 2008-04-23 2013-08-27 Transphorm Inc. Enhancement mode III-N HEMTs
US8289065B2 (en) 2008-09-23 2012-10-16 Transphorm Inc. Inductive load power switching circuits
JP2010118556A (ja) * 2008-11-13 2010-05-27 Furukawa Electric Co Ltd:The 半導体装置および半導体装置の製造方法
US7898004B2 (en) 2008-12-10 2011-03-01 Transphorm Inc. Semiconductor heterostructure diodes
US8742459B2 (en) 2009-05-14 2014-06-03 Transphorm Inc. High voltage III-nitride semiconductor devices
US8390000B2 (en) * 2009-08-28 2013-03-05 Transphorm Inc. Semiconductor devices with field plates
JP2011082216A (ja) 2009-10-02 2011-04-21 Fujitsu Ltd 化合物半導体装置及びその製造方法
WO2011048800A1 (ja) * 2009-10-23 2011-04-28 パナソニック株式会社 半導体装置およびその製造方法
US8314471B2 (en) * 2009-11-17 2012-11-20 Diodes Incorporated Trench devices having improved breakdown voltages and method for manufacturing same
US8269259B2 (en) * 2009-12-07 2012-09-18 International Rectifier Corporation Gated AlGaN/GaN heterojunction Schottky device
US8389977B2 (en) 2009-12-10 2013-03-05 Transphorm Inc. Reverse side engineered III-nitride devices
US8809987B2 (en) * 2010-07-06 2014-08-19 The Hong Kong University Of Science And Technology Normally-off III-nitride metal-2DEG tunnel junction field-effect transistors
CN103168362B (zh) * 2010-10-20 2016-10-12 富士通株式会社 半导体装置及其制造方法
KR102065115B1 (ko) * 2010-11-05 2020-01-13 삼성전자주식회사 E-모드를 갖는 고 전자 이동도 트랜지스터 및 그 제조방법
US8742460B2 (en) 2010-12-15 2014-06-03 Transphorm Inc. Transistors with isolation regions
US8643062B2 (en) * 2011-02-02 2014-02-04 Transphorm Inc. III-N device structures and methods
US8786327B2 (en) 2011-02-28 2014-07-22 Transphorm Inc. Electronic components with reactive filters
US8716141B2 (en) * 2011-03-04 2014-05-06 Transphorm Inc. Electrode configurations for semiconductor devices
US8772842B2 (en) * 2011-03-04 2014-07-08 Transphorm, Inc. Semiconductor diodes with low reverse bias currents
JP5689712B2 (ja) * 2011-03-07 2015-03-25 株式会社日立製作所 半導体装置およびその製造方法
JP5694020B2 (ja) 2011-03-18 2015-04-01 トランスフォーム・ジャパン株式会社 トランジスタ回路
JP5733623B2 (ja) * 2011-06-10 2015-06-10 国立大学法人九州大学 半導体装置の製造方法
JP2014520405A (ja) 2011-06-20 2014-08-21 ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア 電流アパーチャ垂直電子トランジスタ
JP5872810B2 (ja) * 2011-07-21 2016-03-01 サンケン電気株式会社 窒化物半導体装置及びその製造方法
US9041255B2 (en) * 2011-07-22 2015-05-26 Moon J. Kim High capacity electronic switch
US8710511B2 (en) 2011-07-29 2014-04-29 Northrop Grumman Systems Corporation AIN buffer N-polar GaN HEMT profile
ITTO20120675A1 (it) * 2011-08-01 2013-02-02 Selex Sistemi Integrati Spa Dispositivo phemt ad arricchimento/svuotamento e relativo metodo di fabbricazione
TWI508281B (zh) * 2011-08-01 2015-11-11 Murata Manufacturing Co Field effect transistor
US8901604B2 (en) 2011-09-06 2014-12-02 Transphorm Inc. Semiconductor devices with guard rings
US9257547B2 (en) 2011-09-13 2016-02-09 Transphorm Inc. III-N device structures having a non-insulating substrate
US8598937B2 (en) 2011-10-07 2013-12-03 Transphorm Inc. High power semiconductor electronic components with increased reliability
KR101890749B1 (ko) * 2011-10-27 2018-08-23 삼성전자주식회사 전극구조체, 이를 포함하는 질화갈륨계 반도체소자 및 이들의 제조방법
US8772901B2 (en) * 2011-11-11 2014-07-08 Alpha And Omega Semiconductor Incorporated Termination structure for gallium nitride schottky diode
US9070756B2 (en) * 2011-11-18 2015-06-30 Suzhou Institute Of Nano-Tech And Nano-Bionics Of Chinese Academy Of Sciences Group III nitride high electron mobility transistor (HEMT) device
JP5841417B2 (ja) * 2011-11-30 2016-01-13 株式会社日立製作所 窒化物半導体ダイオード
US20130146943A1 (en) * 2011-12-12 2013-06-13 John P. EDWARDS In situ grown gate dielectric and field plate dielectric
US10002957B2 (en) * 2011-12-21 2018-06-19 Power Integrations, Inc. Shield wrap for a heterostructure field effect transistor
JP2013149851A (ja) * 2012-01-20 2013-08-01 Sharp Corp 窒化物半導体装置
US9165766B2 (en) 2012-02-03 2015-10-20 Transphorm Inc. Buffer layer structures suited for III-nitride devices with foreign substrates
WO2013155108A1 (en) 2012-04-09 2013-10-17 Transphorm Inc. N-polar iii-nitride transistors
US9136341B2 (en) 2012-04-18 2015-09-15 Rf Micro Devices, Inc. High voltage field effect transistor finger terminations
CN102709321A (zh) * 2012-04-20 2012-10-03 程凯 增强型开关器件及其制造方法
US9337332B2 (en) * 2012-04-25 2016-05-10 Hrl Laboratories, Llc III-Nitride insulating-gate transistors with passivation
US9379195B2 (en) 2012-05-23 2016-06-28 Hrl Laboratories, Llc HEMT GaN device with a non-uniform lateral two dimensional electron gas profile and method of manufacturing the same
US10700201B2 (en) 2012-05-23 2020-06-30 Hrl Laboratories, Llc HEMT GaN device with a non-uniform lateral two dimensional electron gas profile and method of manufacturing the same
US9000484B2 (en) 2012-05-23 2015-04-07 Hrl Laboratories, Llc Non-uniform lateral profile of two-dimensional electron gas charge density in type III nitride HEMT devices using ion implantation through gray scale mask
WO2013176906A1 (en) * 2012-05-23 2013-11-28 Hrl Laboratories, Llc Hemt device and method of manufacturing the same
US8680536B2 (en) 2012-05-23 2014-03-25 Hrl Laboratories, Llc Non-uniform two dimensional electron gas profile in III-Nitride HEMT devices
US9443941B2 (en) * 2012-06-04 2016-09-13 Infineon Technologies Austria Ag Compound semiconductor transistor with self aligned gate
US10825924B2 (en) 2012-06-26 2020-11-03 Nxp Usa, Inc. Semiconductor device with selectively etched surface passivation
US10522670B2 (en) * 2012-06-26 2019-12-31 Nxp Usa, Inc. Semiconductor device with selectively etched surface passivation
US9184275B2 (en) 2012-06-27 2015-11-10 Transphorm Inc. Semiconductor devices with integrated hole collectors
US9124221B2 (en) 2012-07-16 2015-09-01 Rf Micro Devices, Inc. Wide bandwidth radio frequency amplier having dual gate transistors
US8803246B2 (en) 2012-07-16 2014-08-12 Transphorm Inc. Semiconductor electronic components with integrated current limiters
TWI500157B (zh) * 2012-08-09 2015-09-11 Univ Nat Central 場效電晶體裝置及其製造方法
US9142620B2 (en) 2012-08-24 2015-09-22 Rf Micro Devices, Inc. Power device packaging having backmetals couple the plurality of bond pads to the die backside
US9202874B2 (en) 2012-08-24 2015-12-01 Rf Micro Devices, Inc. Gallium nitride (GaN) device with leakage current-based over-voltage protection
US9917080B2 (en) 2012-08-24 2018-03-13 Qorvo US. Inc. Semiconductor device with electrical overstress (EOS) protection
US8988097B2 (en) * 2012-08-24 2015-03-24 Rf Micro Devices, Inc. Method for on-wafer high voltage testing of semiconductor devices
US9147632B2 (en) 2012-08-24 2015-09-29 Rf Micro Devices, Inc. Semiconductor device having improved heat dissipation
US9070761B2 (en) 2012-08-27 2015-06-30 Rf Micro Devices, Inc. Field effect transistor (FET) having fingers with rippled edges
WO2014035794A1 (en) 2012-08-27 2014-03-06 Rf Micro Devices, Inc Lateral semiconductor device with vertical breakdown region
US9024324B2 (en) * 2012-09-05 2015-05-05 Freescale Semiconductor, Inc. GaN dual field plate device with single field plate metal
US10134727B2 (en) 2012-09-28 2018-11-20 Intel Corporation High breakdown voltage III-N depletion mode MOS capacitors
US9064709B2 (en) * 2012-09-28 2015-06-23 Intel Corporation High breakdown voltage III-N depletion mode MOS capacitors
EP2722890B1 (en) * 2012-10-17 2020-12-16 IMEC vzw Schottky diode structure and method of fabrication
KR101331650B1 (ko) * 2012-10-29 2013-11-20 삼성전기주식회사 반도체 소자
US9325281B2 (en) 2012-10-30 2016-04-26 Rf Micro Devices, Inc. Power amplifier controller
US9171730B2 (en) 2013-02-15 2015-10-27 Transphorm Inc. Electrodes for semiconductor devices and methods of forming the same
CN103178104B (zh) * 2013-02-20 2015-08-19 国网智能电网研究院 一种半导体器件多级场板终端结构及其制造方法
US8946779B2 (en) * 2013-02-26 2015-02-03 Freescale Semiconductor, Inc. MISHFET and Schottky device integration
TWI535007B (zh) * 2013-03-13 2016-05-21 國立中央大學 半導體裝置與其之製造方法
US9087718B2 (en) 2013-03-13 2015-07-21 Transphorm Inc. Enhancement-mode III-nitride devices
US9245992B2 (en) 2013-03-15 2016-01-26 Transphorm Inc. Carbon doping semiconductor devices
US9245736B2 (en) 2013-03-15 2016-01-26 Semiconductor Components Industries, Llc Process of forming a semiconductor wafer
US9070705B2 (en) 2013-03-15 2015-06-30 Semiconductor Components Industries, Llc HEMT semiconductor device and a process of forming the same
US9059076B2 (en) 2013-04-01 2015-06-16 Transphorm Inc. Gate drivers for circuits based on semiconductor devices
US9142626B1 (en) * 2013-04-23 2015-09-22 Hrl Laboratories, Llc Stepped field plate wide bandgap field-effect transistor and method
US9552979B2 (en) * 2013-05-31 2017-01-24 Asm Ip Holding B.V. Cyclic aluminum nitride deposition in a batch reactor
WO2015006111A1 (en) 2013-07-09 2015-01-15 Transphorm Inc. Multilevel inverters and their components
JP6229172B2 (ja) * 2013-07-12 2017-11-15 パナソニックIpマネジメント株式会社 半導体装置
TWI513010B (zh) 2013-07-18 2015-12-11 Richtek Technology Corp 接面能障蕭特基二極體及其製造方法
WO2015009514A1 (en) 2013-07-19 2015-01-22 Transphorm Inc. Iii-nitride transistor including a p-type depleting layer
JP6379358B2 (ja) * 2013-07-25 2018-08-29 パナソニックIpマネジメント株式会社 半導体装置
JP6338832B2 (ja) * 2013-07-31 2018-06-06 ルネサスエレクトロニクス株式会社 半導体装置
US9263569B2 (en) * 2013-08-05 2016-02-16 Taiwan Semiconductor Manufacturing Company, Ltd. MISFET device and method of forming the same
JP6240460B2 (ja) * 2013-10-02 2017-11-29 トランスフォーム・ジャパン株式会社 電界効果型化合物半導体装置及びその製造方法
US9306014B1 (en) 2013-12-27 2016-04-05 Power Integrations, Inc. High-electron-mobility transistors
EP2930754A1 (en) * 2014-04-11 2015-10-14 Nxp B.V. Semiconductor device
US10276712B2 (en) 2014-05-29 2019-04-30 Hrl Laboratories, Llc III-nitride field-effect transistor with dual gates
US9455327B2 (en) 2014-06-06 2016-09-27 Qorvo Us, Inc. Schottky gated transistor with interfacial layer
US9543940B2 (en) 2014-07-03 2017-01-10 Transphorm Inc. Switching circuits having ferrite beads
US9590494B1 (en) 2014-07-17 2017-03-07 Transphorm Inc. Bridgeless power factor correction circuits
US9318593B2 (en) 2014-07-21 2016-04-19 Transphorm Inc. Forming enhancement mode III-nitride devices
US9536803B2 (en) 2014-09-05 2017-01-03 Qorvo Us, Inc. Integrated power module with improved isolation and thermal conductivity
US9571093B2 (en) 2014-09-16 2017-02-14 Navitas Semiconductor, Inc. Half bridge driver circuits
US9537338B2 (en) 2014-09-16 2017-01-03 Navitas Semiconductor Inc. Level shift and inverter circuits for GaN devices
US9960154B2 (en) 2014-09-19 2018-05-01 Navitas Semiconductor, Inc. GaN structures
CN104465795B (zh) * 2014-11-19 2017-11-03 苏州捷芯威半导体有限公司 一种肖特基二极管及其制作方法
US11164970B2 (en) 2014-11-25 2021-11-02 Taiwan Semiconductor Manufacturing Company, Ltd. Contact field plate
US10756208B2 (en) 2014-11-25 2020-08-25 Taiwan Semiconductor Manufacturing Co., Ltd. Integrated chip and method of forming the same
US9536967B2 (en) 2014-12-16 2017-01-03 Transphorm Inc. Recessed ohmic contacts in a III-N device
US9536966B2 (en) 2014-12-16 2017-01-03 Transphorm Inc. Gate structures for III-N devices
US10062684B2 (en) 2015-02-04 2018-08-28 Qorvo Us, Inc. Transition frequency multiplier semiconductor device
US10615158B2 (en) 2015-02-04 2020-04-07 Qorvo Us, Inc. Transition frequency multiplier semiconductor device
US9543402B1 (en) * 2015-08-04 2017-01-10 Power Integrations, Inc. Integrated high performance lateral schottky diode
US9812532B1 (en) 2015-08-28 2017-11-07 Hrl Laboratories, Llc III-nitride P-channel transistor
ITUB20155536A1 (it) 2015-11-12 2017-05-12 St Microelectronics Srl Transistore hemt di tipo normalmente spento includente una trincea contenente una regione di gate e formante almeno un gradino, e relativo procedimento di fabbricazione
CN108292678B (zh) 2015-11-19 2021-07-06 Hrl实验室有限责任公司 具有双栅极的iii族氮化物场效应晶体管
WO2017123999A1 (en) 2016-01-15 2017-07-20 Transphorm Inc. Enhancement mode iii-nitride devices having an al(1-x)sixo gate insulator
US9831867B1 (en) 2016-02-22 2017-11-28 Navitas Semiconductor, Inc. Half bridge driver circuits
JP6504313B2 (ja) * 2016-03-14 2019-04-24 富士電機株式会社 半導体装置および製造方法
US9941398B2 (en) * 2016-03-17 2018-04-10 Taiwan Semiconductor Manufacturing Company Ltd. High-electron-mobility transistor (HEMT) capable of protecting a III-V compound layer
CN107230629A (zh) * 2016-03-25 2017-10-03 北京大学 氮化镓场效应晶体管的制作方法及氮化镓场效应晶体管
US9722063B1 (en) * 2016-04-11 2017-08-01 Power Integrations, Inc. Protective insulator for HFET devices
US10651317B2 (en) 2016-04-15 2020-05-12 Macom Technology Solutions Holdings, Inc. High-voltage lateral GaN-on-silicon Schottky diode
US20170301780A1 (en) * 2016-04-15 2017-10-19 Macom Technology Solutions Holdings, Inc. High-voltage gan high electron mobility transistors with reduced leakage current
TWI762486B (zh) 2016-05-31 2022-05-01 美商創世舫科技有限公司 包含漸變空乏層的三族氮化物裝置
JP6685870B2 (ja) * 2016-09-15 2020-04-22 株式会社東芝 半導体装置
CN106711233B (zh) * 2016-12-09 2020-07-24 清华大学 光调制的二极管和功率电路
TWI607565B (zh) 2016-12-20 2017-12-01 新唐科技股份有限公司 半導體基底以及半導體元件
CN107331608B (zh) * 2017-08-23 2020-11-24 成都海威华芯科技有限公司 一种双台阶t型栅的制作方法
US10630285B1 (en) 2017-11-21 2020-04-21 Transphorm Technology, Inc. Switching circuits having drain connected ferrite beads
US10950598B2 (en) 2018-01-19 2021-03-16 Macom Technology Solutions Holdings, Inc. Heterolithic microwave integrated circuits including gallium-nitride devices formed on highly doped semiconductor
US11233047B2 (en) 2018-01-19 2022-01-25 Macom Technology Solutions Holdings, Inc. Heterolithic microwave integrated circuits including gallium-nitride devices on highly doped regions of intrinsic silicon
US11056483B2 (en) 2018-01-19 2021-07-06 Macom Technology Solutions Holdings, Inc. Heterolithic microwave integrated circuits including gallium-nitride devices on intrinsic semiconductor
CN109786453B (zh) * 2018-04-25 2022-05-17 苏州捷芯威半导体有限公司 半导体器件及其制作方法
US20190393041A1 (en) * 2018-06-20 2019-12-26 Intel Corporation Methods of transistor gate structuring using single operation dummy gate removal
JP7359359B2 (ja) * 2018-07-04 2023-10-11 Ignite株式会社 Mems装置及びmems装置を製造する方法
CN109308999B (zh) * 2018-09-29 2022-03-29 大连芯冠科技有限公司 选择性刻蚀制备功率器件多场板的方法
US10756207B2 (en) 2018-10-12 2020-08-25 Transphorm Technology, Inc. Lateral III-nitride devices including a vertical gate module
US10950497B2 (en) * 2018-11-26 2021-03-16 Taiwan Semiconductor Manufacturing Co., Ltd. Electrical connection for semiconductor devices
TWI680503B (zh) * 2018-12-26 2019-12-21 杰力科技股份有限公司 氮化鎵高電子移動率電晶體的閘極結構的製造方法
US11121245B2 (en) * 2019-02-22 2021-09-14 Efficient Power Conversion Corporation Field plate structures with patterned surface passivation layers and methods for manufacturing thereof
CN113826206A (zh) 2019-03-21 2021-12-21 创世舫科技有限公司 Iii-氮化物器件的集成设计
WO2020214227A2 (en) 2019-04-04 2020-10-22 Hrl Laboratories, Llc Miniature field plate t-gate and method of fabricating the same
TWI719484B (zh) * 2019-05-20 2021-02-21 世界先進積體電路股份有限公司 半導體結構
CN112216738A (zh) * 2019-07-09 2021-01-12 台湾积体电路制造股份有限公司 集成芯片及其形成方法
CN112349773A (zh) * 2019-08-07 2021-02-09 苏州能讯高能半导体有限公司 一种半导体器件及其制备方法
CN110828307A (zh) * 2019-10-16 2020-02-21 中芯集成电路制造(绍兴)有限公司 形成具有倾斜侧壁的材料层的方法及半导体器件
US11695068B2 (en) 2020-03-09 2023-07-04 Insyt, Inc. Greyscale lithography for double-slanted gate connected field plate
US11848389B2 (en) * 2020-03-19 2023-12-19 Ohio State Innovation Foundation Low turn on and high breakdown voltage lateral diode
US11600614B2 (en) 2020-03-26 2023-03-07 Macom Technology Solutions Holdings, Inc. Microwave integrated circuits including gallium-nitride devices on silicon
US11749656B2 (en) 2020-06-16 2023-09-05 Transphorm Technology, Inc. Module configurations for integrated III-Nitride devices
JP2023537713A (ja) 2020-08-05 2023-09-05 トランスフォーム テクノロジー,インコーポレーテッド 空乏層を有するiii族窒化物デバイス
CN112038227A (zh) * 2020-08-12 2020-12-04 深圳市汇芯通信技术有限公司 栅极无损伤制备方法及基于该制备方法的hemt
TWI811562B (zh) * 2020-08-18 2023-08-11 新唐科技股份有限公司 半導體裝置的製造方法
CN111952366A (zh) * 2020-08-19 2020-11-17 深圳方正微电子有限公司 场效应晶体管及其制备方法
CN111952360B (zh) * 2020-08-19 2023-02-21 深圳方正微电子有限公司 场效应管及其制备方法
CN111952355B (zh) * 2020-08-21 2021-03-12 浙江大学 基于多漏指结构的GaN HEMT器件及其制备方法
CN112736132B (zh) * 2021-01-06 2023-06-20 湖北文理学院 InP PHEMT外延结构及其制备方法
US11682721B2 (en) * 2021-01-20 2023-06-20 Raytheon Company Asymmetrically angled gate structure and method for making same
JP7437346B2 (ja) * 2021-04-15 2024-02-22 株式会社東芝 半導体装置及びその製造方法
CN113314405B (zh) * 2021-05-26 2022-07-26 四川上特科技有限公司 半导体功率器件斜坡场板的制作方法
CN114613856B (zh) * 2022-04-12 2023-04-25 电子科技大学 一种双异质结GaN RC-HEMT器件
WO2024092543A1 (en) * 2022-11-02 2024-05-10 Innoscience (suzhou) Semiconductor Co., Ltd. Nitride-based semiconductor device and method for manufacturing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6979863B2 (en) * 2003-04-24 2005-12-27 Cree, Inc. Silicon carbide MOSFETs with integrated antiparallel junction barrier Schottky free wheeling diodes and methods of fabricating the same
US20070018199A1 (en) * 2005-07-20 2007-01-25 Cree, Inc. Nitride-based transistors and fabrication methods with an etch stop layer
US7388236B2 (en) * 2006-03-29 2008-06-17 Cree, Inc. High efficiency and/or high power density wide bandgap transistors
US7456443B2 (en) * 2004-11-23 2008-11-25 Cree, Inc. Transistors having buried n-type and p-type regions beneath the source region
US7465967B2 (en) * 2005-03-15 2008-12-16 Cree, Inc. Group III nitride field effect transistors (FETS) capable of withstanding high temperature reverse bias test conditions

Family Cites Families (172)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145670A (ja) * 1984-01-10 1985-08-01 Nec Corp 半導体装置の製造方法
US4645562A (en) * 1985-04-29 1987-02-24 Hughes Aircraft Company Double layer photoresist technique for side-wall profile control in plasma etching processes
US4728826A (en) 1986-03-19 1988-03-01 Siemens Aktiengesellschaft MOSFET switch with inductive load
US4821093A (en) 1986-08-18 1989-04-11 The United States Of America As Represented By The Secretary Of The Army Dual channel high electron mobility field effect transistor
JPH07120807B2 (ja) 1986-12-20 1995-12-20 富士通株式会社 定電流半導体装置
US5329147A (en) 1993-01-04 1994-07-12 Xerox Corporation High voltage integrated flyback circuit in 2 μm CMOS
US6097046A (en) 1993-04-30 2000-08-01 Texas Instruments Incorporated Vertical field effect transistor and diode
US5740192A (en) 1994-12-19 1998-04-14 Kabushiki Kaisha Toshiba Semiconductor laser
US5646069A (en) 1995-06-07 1997-07-08 Hughes Aircraft Company Fabrication process for Alx In1-x As/Gay In1-y As power HFET ohmic contacts
JPH09306926A (ja) * 1996-05-10 1997-11-28 Hitachi Ltd 半導体装置およびその製造方法
JP3677350B2 (ja) 1996-06-10 2005-07-27 三菱電機株式会社 半導体装置、及び半導体装置の製造方法
US6008684A (en) 1996-10-23 1999-12-28 Industrial Technology Research Institute CMOS output buffer with CMOS-controlled lateral SCR devices
US5714393A (en) 1996-12-09 1998-02-03 Motorola, Inc. Diode-connected semiconductor device and method of manufacture
US6316793B1 (en) 1998-06-12 2001-11-13 Cree, Inc. Nitride based transistors on semi-insulating silicon carbide substrates
JP2000021900A (ja) * 1998-06-30 2000-01-21 Toshiba Corp 電界効果トランジスタの製造方法
JP3180776B2 (ja) * 1998-09-22 2001-06-25 日本電気株式会社 電界効果型トランジスタ
JP2000058871A (ja) 1999-07-02 2000-02-25 Citizen Watch Co Ltd 電子機器の集積回路
US6984571B1 (en) 1999-10-01 2006-01-10 Ziptronix, Inc. Three dimensional device integration method and integrated device
US6586781B2 (en) 2000-02-04 2003-07-01 Cree Lighting Company Group III nitride based FETs and HEMTs with reduced trapping and method for producing the same
JP3751791B2 (ja) 2000-03-28 2006-03-01 日本電気株式会社 ヘテロ接合電界効果トランジスタ
JP5130641B2 (ja) 2006-03-31 2013-01-30 サンケン電気株式会社 複合半導体装置
US6475889B1 (en) 2000-04-11 2002-11-05 Cree, Inc. Method of forming vias in silicon carbide and resulting devices and circuits
US7892974B2 (en) 2000-04-11 2011-02-22 Cree, Inc. Method of forming vias in silicon carbide and resulting devices and circuits
US7125786B2 (en) 2000-04-11 2006-10-24 Cree, Inc. Method of forming vias in silicon carbide and resulting devices and circuits
US6580101B2 (en) * 2000-04-25 2003-06-17 The Furukawa Electric Co., Ltd. GaN-based compound semiconductor device
US6624452B2 (en) 2000-07-28 2003-09-23 The Regents Of The University Of California Gallium nitride-based HFET and a method for fabricating a gallium nitride-based HFET
US6727531B1 (en) 2000-08-07 2004-04-27 Advanced Technology Materials, Inc. Indium gallium nitride channel high electron mobility transistors, and method of making the same
US6548333B2 (en) 2000-12-01 2003-04-15 Cree, Inc. Aluminum gallium nitride/gallium nitride high electron mobility transistors having a gate contact on a gallium nitride based cap segment
TW466768B (en) 2000-12-30 2001-12-01 Nat Science Council An In0.34Al0.66As0.85Sb0.15/InP HFET utilizing InP channels
US6830976B2 (en) 2001-03-02 2004-12-14 Amberwave Systems Corproation Relaxed silicon germanium platform for high speed CMOS electronics and high speed analog circuits
US6849882B2 (en) * 2001-05-11 2005-02-01 Cree Inc. Group-III nitride based high electron mobility transistor (HEMT) with barrier/spacer layer
CA2454269C (en) 2001-07-24 2015-07-07 Primit Parikh Insulating gate algan/gan hemt
JP4177048B2 (ja) 2001-11-27 2008-11-05 古河電気工業株式会社 電力変換装置及びそれに用いるGaN系半導体装置
US7030428B2 (en) 2001-12-03 2006-04-18 Cree, Inc. Strain balanced nitride heterojunction transistors
JP2003244943A (ja) 2002-02-13 2003-08-29 Honda Motor Co Ltd 電源装置の昇圧装置
US7919791B2 (en) 2002-03-25 2011-04-05 Cree, Inc. Doped group III-V nitride materials, and microelectronic devices and device precursor structures comprising same
US6982204B2 (en) 2002-07-16 2006-01-03 Cree, Inc. Nitride-based transistors and methods of fabrication thereof using non-etched contact recesses
WO2004019415A1 (en) 2002-08-26 2004-03-04 University Of Florida GaN-TYPE ENHANCEMENT MOSFET USING HETERO STRUCTURE
JP2006505169A (ja) 2002-10-29 2006-02-09 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 双方向性2重nmosスイッチ
JP4385205B2 (ja) 2002-12-16 2009-12-16 日本電気株式会社 電界効果トランジスタ
US7169634B2 (en) 2003-01-15 2007-01-30 Advanced Power Technology, Inc. Design and fabrication of rugged FRED
JP2004253620A (ja) * 2003-02-20 2004-09-09 Nec Compound Semiconductor Devices Ltd 電界効果型トランジスタおよびその製造方法
JP2004260114A (ja) 2003-02-27 2004-09-16 Shin Etsu Handotai Co Ltd 化合物半導体素子
US7112860B2 (en) 2003-03-03 2006-09-26 Cree, Inc. Integrated nitride-based acoustic wave devices and methods of fabricating integrated nitride-based acoustic wave devices
US7078743B2 (en) 2003-05-15 2006-07-18 Matsushita Electric Industrial Co., Ltd. Field effect transistor semiconductor device
EP1665358B1 (en) 2003-09-09 2020-07-01 The Regents of The University of California Fabrication of single or multiple gate field plates
US7501669B2 (en) 2003-09-09 2009-03-10 Cree, Inc. Wide bandgap transistor devices with field plates
WO2005062745A2 (en) 2003-10-10 2005-07-14 The Regents Of The University Of California GaN/AlGaN/GaN DISPERSION-FREE HIGH ELECTRON MOBILITY TRANSISTORS
US7268375B2 (en) 2003-10-27 2007-09-11 Sensor Electronic Technology, Inc. Inverted nitride-based semiconductor structure
US6867078B1 (en) * 2003-11-19 2005-03-15 Freescale Semiconductor, Inc. Method for forming a microwave field effect transistor with high operating voltage
US7071498B2 (en) 2003-12-17 2006-07-04 Nitronex Corporation Gallium nitride material devices including an electrode-defining layer and methods of forming the same
US20050133816A1 (en) 2003-12-19 2005-06-23 Zhaoyang Fan III-nitride quantum-well field effect transistors
US7045404B2 (en) 2004-01-16 2006-05-16 Cree, Inc. Nitride-based transistors with a protective layer and a low-damage recess and methods of fabrication thereof
US7901994B2 (en) 2004-01-16 2011-03-08 Cree, Inc. Methods of manufacturing group III nitride semiconductor devices with silicon nitride layers
US8174048B2 (en) 2004-01-23 2012-05-08 International Rectifier Corporation III-nitride current control device and method of manufacture
US7382001B2 (en) * 2004-01-23 2008-06-03 International Rectifier Corporation Enhancement mode III-nitride FET
US7612390B2 (en) 2004-02-05 2009-11-03 Cree, Inc. Heterojunction transistors including energy barriers
US7170111B2 (en) 2004-02-05 2007-01-30 Cree, Inc. Nitride heterojunction transistors having charge-transfer induced energy barriers and methods of fabricating the same
US7465997B2 (en) 2004-02-12 2008-12-16 International Rectifier Corporation III-nitride bidirectional switch
US7550781B2 (en) 2004-02-12 2009-06-23 International Rectifier Corporation Integrated III-nitride power devices
US7084475B2 (en) 2004-02-17 2006-08-01 Velox Semiconductor Corporation Lateral conduction Schottky diode with plural mesas
WO2005081304A1 (ja) * 2004-02-20 2005-09-01 Nec Corporation 電界効果トランジスタ
US7573078B2 (en) * 2004-05-11 2009-08-11 Cree, Inc. Wide bandgap transistors with multiple field plates
US7550783B2 (en) 2004-05-11 2009-06-23 Cree, Inc. Wide bandgap HEMTs with source connected field plates
US7432142B2 (en) 2004-05-20 2008-10-07 Cree, Inc. Methods of fabricating nitride-based transistors having regrown ohmic contact regions
US7332795B2 (en) 2004-05-22 2008-02-19 Cree, Inc. Dielectric passivation for semiconductor devices
JP4810072B2 (ja) * 2004-06-15 2011-11-09 株式会社東芝 窒素化合物含有半導体装置
WO2006001369A1 (ja) 2004-06-24 2006-01-05 Nec Corporation 半導体装置
JP2006032552A (ja) 2004-07-14 2006-02-02 Toshiba Corp 窒化物含有半導体装置
JP4744109B2 (ja) 2004-07-20 2011-08-10 トヨタ自動車株式会社 半導体装置とその製造方法
JP2006033723A (ja) 2004-07-21 2006-02-02 Sharp Corp 電力制御用光結合素子およびこの電力制御用光結合素子を用いた電子機器
US7238560B2 (en) 2004-07-23 2007-07-03 Cree, Inc. Methods of fabricating nitride-based transistors with a cap layer and a recessed gate
US7229903B2 (en) * 2004-08-25 2007-06-12 Freescale Semiconductor, Inc. Recessed semiconductor device
US7265399B2 (en) 2004-10-29 2007-09-04 Cree, Inc. Asymetric layout structures for transistors and methods of fabricating the same
JP4650224B2 (ja) 2004-11-19 2011-03-16 日亜化学工業株式会社 電界効果トランジスタ
JP4637553B2 (ja) 2004-11-22 2011-02-23 パナソニック株式会社 ショットキーバリアダイオード及びそれを用いた集積回路
US7709859B2 (en) 2004-11-23 2010-05-04 Cree, Inc. Cap layers including aluminum nitride for nitride-based transistors
US7161194B2 (en) 2004-12-06 2007-01-09 Cree, Inc. High power density and/or linearity transistors
US7834380B2 (en) 2004-12-09 2010-11-16 Panasonic Corporation Field effect transistor and method for fabricating the same
US7217960B2 (en) 2005-01-14 2007-05-15 Matsushita Electric Industrial Co., Ltd. Semiconductor device
JP4845872B2 (ja) * 2005-01-25 2011-12-28 富士通株式会社 Mis構造を有する半導体装置及びその製造方法
US7429534B2 (en) 2005-02-22 2008-09-30 Sensor Electronic Technology, Inc. Etching a nitride-based heterostructure
US7253454B2 (en) 2005-03-03 2007-08-07 Cree, Inc. High electron mobility transistor
US11791385B2 (en) * 2005-03-11 2023-10-17 Wolfspeed, Inc. Wide bandgap transistors with gate-source field plates
US7321132B2 (en) 2005-03-15 2008-01-22 Lockheed Martin Corporation Multi-layer structure for use in the fabrication of integrated circuit devices and methods for fabrication of same
US7439557B2 (en) 2005-03-29 2008-10-21 Coldwatt, Inc. Semiconductor device having a lateral channel and contacts on opposing surfaces thereof
JP4912604B2 (ja) 2005-03-30 2012-04-11 住友電工デバイス・イノベーション株式会社 窒化物半導体hemtおよびその製造方法。
US7544963B2 (en) 2005-04-29 2009-06-09 Cree, Inc. Binary group III-nitride based high electron mobility transistors
US7615774B2 (en) 2005-04-29 2009-11-10 Cree.Inc. Aluminum free group III-nitride based high electron mobility transistors
US7364988B2 (en) 2005-06-08 2008-04-29 Cree, Inc. Method of manufacturing gallium nitride based high-electron mobility devices
US7326971B2 (en) 2005-06-08 2008-02-05 Cree, Inc. Gallium nitride based high-electron mobility devices
US7408399B2 (en) 2005-06-27 2008-08-05 International Rectifier Corporation Active driving of normally on, normally off cascoded configuration devices through asymmetrical CMOS
US7855401B2 (en) 2005-06-29 2010-12-21 Cree, Inc. Passivation of wide band-gap based semiconductor devices with hydrogen-free sputtered nitrides
KR101045573B1 (ko) 2005-07-06 2011-07-01 인터내쇼널 렉티파이어 코포레이션 Ⅲ족 질화물 인헨스먼트 모드 소자
JP4712459B2 (ja) 2005-07-08 2011-06-29 パナソニック株式会社 トランジスタ及びその動作方法
JP4730529B2 (ja) 2005-07-13 2011-07-20 サンケン電気株式会社 電界効果トランジスタ
US7548112B2 (en) 2005-07-21 2009-06-16 Cree, Inc. Switch mode power amplifier using MIS-HEMT with field plate extension
KR100610639B1 (ko) 2005-07-22 2006-08-09 삼성전기주식회사 수직 구조 질화갈륨계 발광다이오드 소자 및 그 제조방법
JP4751150B2 (ja) 2005-08-31 2011-08-17 株式会社東芝 窒化物系半導体装置
EP2312635B1 (en) 2005-09-07 2020-04-01 Cree, Inc. Transistors with fluorine treatment
JP2009509343A (ja) 2005-09-16 2009-03-05 ザ リージェンツ オブ ザ ユニバーシティ オブ カリフォルニア N極窒化アルミニウムガリウム/窒化ガリウムエンハンスメントモード電界効果トランジスタ
US7482788B2 (en) 2005-10-12 2009-01-27 System General Corp. Buck converter for both full load and light load operations
US8114717B2 (en) 2005-11-15 2012-02-14 The Regents Of The University Of California Methods to shape the electric field in electron devices, passivate dislocations and point defects, and enhance the luminescence efficiency of optical devices
JP2007149794A (ja) 2005-11-25 2007-06-14 Matsushita Electric Ind Co Ltd 電界効果トランジスタ
US7932539B2 (en) 2005-11-29 2011-04-26 The Hong Kong University Of Science And Technology Enhancement-mode III-N devices, circuits, and methods
TW200723624A (en) 2005-12-05 2007-06-16 Univ Nat Chiao Tung Process of producing group III nitride based reflectors
KR100661602B1 (ko) 2005-12-09 2006-12-26 삼성전기주식회사 수직 구조 질화갈륨계 led 소자의 제조방법
JP2007165446A (ja) 2005-12-12 2007-06-28 Oki Electric Ind Co Ltd 半導体素子のオーミックコンタクト構造
US7419892B2 (en) 2005-12-13 2008-09-02 Cree, Inc. Semiconductor devices including implanted regions and protective layers and methods of forming the same
JP5065595B2 (ja) 2005-12-28 2012-11-07 株式会社東芝 窒化物系半導体装置
JP5098649B2 (ja) 2005-12-28 2012-12-12 日本電気株式会社 電界効果トランジスタ、ならびに、該電界効果トランジスタの作製に供される多層エピタキシャル膜
US7709269B2 (en) 2006-01-17 2010-05-04 Cree, Inc. Methods of fabricating transistors including dielectrically-supported gate electrodes
US7592211B2 (en) 2006-01-17 2009-09-22 Cree, Inc. Methods of fabricating transistors including supported gate electrodes
JP2007215331A (ja) 2006-02-10 2007-08-23 Hitachi Ltd 昇圧回路
US7566918B2 (en) 2006-02-23 2009-07-28 Cree, Inc. Nitride based transistors for millimeter wave operation
JP2007242853A (ja) 2006-03-08 2007-09-20 Sanken Electric Co Ltd 半導体基体及びこれを使用した半導体装置
EP1998376B1 (en) * 2006-03-16 2011-08-03 Fujitsu Ltd. Compound semiconductor device and process for producing the same
TW200742076A (en) 2006-03-17 2007-11-01 Sumitomo Chemical Co Semiconductor field effect transistor and method of manufacturing the same
WO2007109301A2 (en) 2006-03-20 2007-09-27 International Rectifier Corporation Merged gate cascode transistor
US7745851B2 (en) 2006-04-13 2010-06-29 Cree, Inc. Polytype hetero-interface high electron mobility device and method of making
US7629627B2 (en) 2006-04-18 2009-12-08 University Of Massachusetts Field effect transistor with independently biased gates
TW200830550A (en) * 2006-08-18 2008-07-16 Univ California High breakdown enhancement mode gallium nitride based high electron mobility transistors with integrated slant field plate
KR100782430B1 (ko) * 2006-09-22 2007-12-05 한국과학기술원 고전력을 위한 내부전계전극을 갖는 갈륨나이트라이드기반의 고전자 이동도 트랜지스터 구조
JP5520432B2 (ja) * 2006-10-03 2014-06-11 古河電気工業株式会社 半導体トランジスタの製造方法
JP4282708B2 (ja) 2006-10-20 2009-06-24 株式会社東芝 窒化物系半導体装置
US7692263B2 (en) * 2006-11-21 2010-04-06 Cree, Inc. High voltage GaN transistors
JP5114947B2 (ja) 2006-12-28 2013-01-09 富士通株式会社 窒化物半導体装置とその製造方法
JP2008199771A (ja) 2007-02-13 2008-08-28 Fujitsu Ten Ltd 昇圧回路制御装置、及び昇圧回路
US7655962B2 (en) 2007-02-23 2010-02-02 Sensor Electronic Technology, Inc. Enhancement mode insulated gate heterostructure field-effect transistor with electrically isolated RF-enhanced source contact
US8110425B2 (en) 2007-03-20 2012-02-07 Luminus Devices, Inc. Laser liftoff structure and related methods
US7501670B2 (en) 2007-03-20 2009-03-10 Velox Semiconductor Corporation Cascode circuit employing a depletion-mode, GaN-based FET
JP2008243848A (ja) * 2007-03-23 2008-10-09 Sanken Electric Co Ltd 半導体装置
US20090085065A1 (en) 2007-03-29 2009-04-02 The Regents Of The University Of California Method to fabricate iii-n semiconductor devices on the n-face of layers which are grown in the iii-face direction using wafer bonding and substrate removal
TWI467759B (zh) 2007-03-29 2015-01-01 Univ California 具有低緩衝漏電及低寄生阻抗之氮面高電子遷移電晶體
FR2914500B1 (fr) 2007-03-30 2009-11-20 Picogiga Internat Dispositif electronique a contact ohmique ameliore
JP5292716B2 (ja) 2007-03-30 2013-09-18 富士通株式会社 化合物半導体装置
US8318562B2 (en) * 2007-04-02 2012-11-27 University Of South Carolina Method to increase breakdown voltage of semiconductor devices
JP2008288289A (ja) 2007-05-16 2008-11-27 Oki Electric Ind Co Ltd 電界効果トランジスタとその製造方法
JP4478175B2 (ja) 2007-06-26 2010-06-09 株式会社東芝 半導体装置
CN101359686B (zh) 2007-08-03 2013-01-02 香港科技大学 可靠的常关型ⅲ-氮化物有源器件结构及相关方法和系统
JP4775859B2 (ja) 2007-08-24 2011-09-21 シャープ株式会社 窒化物半導体装置とそれを含む電力変換装置
US7875537B2 (en) 2007-08-29 2011-01-25 Cree, Inc. High temperature ion implantation of nitride based HEMTs
JP5487550B2 (ja) * 2007-08-29 2014-05-07 サンケン電気株式会社 電界効果半導体装置及びその製造方法
JP5401775B2 (ja) * 2007-08-31 2014-01-29 富士通株式会社 化合物半導体装置およびその製造方法
EP2887402B1 (en) 2007-09-12 2019-06-12 Transphorm Inc. III-nitride bidirectional switches
US7795642B2 (en) 2007-09-14 2010-09-14 Transphorm, Inc. III-nitride devices with recessed gates
US20090075455A1 (en) 2007-09-14 2009-03-19 Umesh Mishra Growing N-polar III-nitride Structures
US7915643B2 (en) 2007-09-17 2011-03-29 Transphorm Inc. Enhancement mode gallium nitride power devices
US20090072269A1 (en) 2007-09-17 2009-03-19 Chang Soo Suh Gallium nitride diodes and integrated components
JP2009117485A (ja) * 2007-11-02 2009-05-28 Panasonic Corp 窒化物半導体装置
US8431962B2 (en) * 2007-12-07 2013-04-30 Northrop Grumman Systems Corporation Composite passivation process for nitride FET
CN101897029B (zh) 2007-12-10 2015-08-12 特兰斯夫公司 绝缘栅e模式晶体管
US7965126B2 (en) 2008-02-12 2011-06-21 Transphorm Inc. Bridge circuits and their components
US8674407B2 (en) 2008-03-12 2014-03-18 Renesas Electronics Corporation Semiconductor device using a group III nitride-based semiconductor
US8519438B2 (en) 2008-04-23 2013-08-27 Transphorm Inc. Enhancement mode III-N HEMTs
US7985986B2 (en) 2008-07-31 2011-07-26 Cree, Inc. Normally-off semiconductor devices
TWI371163B (en) 2008-09-12 2012-08-21 Glacialtech Inc Unidirectional mosfet and applications thereof
US8289065B2 (en) 2008-09-23 2012-10-16 Transphorm Inc. Inductive load power switching circuits
US7898004B2 (en) 2008-12-10 2011-03-01 Transphorm Inc. Semiconductor heterostructure diodes
US7884394B2 (en) 2009-02-09 2011-02-08 Transphorm Inc. III-nitride devices and circuits
US8742459B2 (en) 2009-05-14 2014-06-03 Transphorm Inc. High voltage III-nitride semiconductor devices
US8390000B2 (en) * 2009-08-28 2013-03-05 Transphorm Inc. Semiconductor devices with field plates
US8138529B2 (en) 2009-11-02 2012-03-20 Transphorm Inc. Package configurations for low EMI circuits
US8389977B2 (en) 2009-12-10 2013-03-05 Transphorm Inc. Reverse side engineered III-nitride devices
US8816497B2 (en) 2010-01-08 2014-08-26 Transphorm Inc. Electronic devices and components for high efficiency power circuits
US8624662B2 (en) 2010-02-05 2014-01-07 Transphorm Inc. Semiconductor electronic components and circuits
US20120126239A1 (en) 2010-11-24 2012-05-24 Transphorm Inc. Layer structures for controlling stress of heteroepitaxially grown iii-nitride layers
US8742460B2 (en) 2010-12-15 2014-06-03 Transphorm Inc. Transistors with isolation regions
US8643062B2 (en) 2011-02-02 2014-02-04 Transphorm Inc. III-N device structures and methods
US8786327B2 (en) 2011-02-28 2014-07-22 Transphorm Inc. Electronic components with reactive filters
US8716141B2 (en) 2011-03-04 2014-05-06 Transphorm Inc. Electrode configurations for semiconductor devices
US8772842B2 (en) 2011-03-04 2014-07-08 Transphorm, Inc. Semiconductor diodes with low reverse bias currents

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6979863B2 (en) * 2003-04-24 2005-12-27 Cree, Inc. Silicon carbide MOSFETs with integrated antiparallel junction barrier Schottky free wheeling diodes and methods of fabricating the same
US7456443B2 (en) * 2004-11-23 2008-11-25 Cree, Inc. Transistors having buried n-type and p-type regions beneath the source region
US7465967B2 (en) * 2005-03-15 2008-12-16 Cree, Inc. Group III nitride field effect transistors (FETS) capable of withstanding high temperature reverse bias test conditions
US20070018199A1 (en) * 2005-07-20 2007-01-25 Cree, Inc. Nitride-based transistors and fabrication methods with an etch stop layer
US7388236B2 (en) * 2006-03-29 2008-06-17 Cree, Inc. High efficiency and/or high power density wide bandgap transistors

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