JP6701385B2 - 発光デバイスにおいて層を成長させるためにリモートプラズマ化学気相堆積およびスパッタリング堆積を使用するための方法 - Google Patents
発光デバイスにおいて層を成長させるためにリモートプラズマ化学気相堆積およびスパッタリング堆積を使用するための方法 Download PDFInfo
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- Electrodes Of Semiconductors (AREA)
Description
本特許出願は、2016年5月20日付の米国仮特許出願第62/339412号および2016年7月14日付の欧州特許出願第16179434.2号に基づく優先権を主張するものである。これらのコンテンツは、これにより、その全体が明らかにされるかのように、参照により、ここにおいて包含されている。
CVDとスパッタリング堆積のうち少なくとも1つを使用するための方法である。一般的に、RP−CVDおよびスパッタリング堆積は、成長プロセスの最中に水素またはアンモニアを使用しない。すなわち、層は、水素含有窒素前駆体(hydrogen-bearing nitrogen precursor)なしで成長する。特に、pGaN層及び/又はトンネル接合材料を成長させるために、RP−CVDおよびスパッタリング堆積を使用することができ、水素がpGaN層に進入するのを防ぎ、かつ、いくつかの実装において成長後のpGaN層の活性化の必要性を排除することができる。
Claims (14)
- 発光デバイスを成長させるための方法であって、
有機金属化学気相成長法(MOCVD)を使用して、成長基板上に発光デバイス構造体を成長させるステップであり、該発光デバイス構造体は、n型領域、発光領域、およびp型領域を含んでいる、ステップと、
リモートプラズマ化学気相堆積(RP−CVD)とスパッタリング堆積のうち少なくとも1つを使用して、前記発光デバイス構造体上にトンネル接合に係る水素フリー層の少なくとも一部分を成長させるステップと、
を含み、
前記発光デバイス構造体を成長させるステップは、さらに、
有機金属化学気相成長法(MOCVD)によって、前記n型領域、前記発光領域、および前記p型領域の第1部分を成長させるステップと、
前記n型領域、前記発光領域、および前記p型領域の前記第1部分をアニールするステップと、
を含む、方法。 - トンネル接合に係る水素フリー層の少なくとも一部分を成長させる前記ステップは、
p++層を前記p型領域と直接接触させるステップであり、該p++層は、前記p型領域よりも強くドープされている、ステップと、
n++層を前記p++層と接触させるステップであり、前記トンネル接合に係る前記層の少なくとも一部分は、前記p++層である、ステップと、
を含み、
前記発光デバイス構造体および前記トンネル接合は、III族窒化物材料でできている、
請求項1に記載の方法。 - 前記発光デバイス構造体を成長させるステップは、さらに、
前記アニールの後で、RP−CVDとスパッタリング堆積のうち少なくとも1つによって、前記p型領域の水素フリーの第2部分を成長させるステップ、
を含む、請求項1に記載の方法。 - 前記発光デバイス構造体を成長させるステップは、
MOCVDによって、前記n型領域、前記発光領域、および前記p型領域を成長させるステップと、
前記n型領域、前記III族窒化物の発光領域、および前記p型領域をアニールするステップと、を含み、
トンネル接合に係る前記層の少なくとも一部分を成長させる前記ステップは、さらに、
前記アニールの後で、前記p型領域上の前記p++層を成長させるステップと、
を含む、請求項2に記載の方法。 - 前記方法は、さらに、
前記n型領域と直接接触する第1金属コンタクト、および、n型コンタクト層と直接接触する第2金属コンタクトを形成するステップ、
を含む、請求項1に記載の方法。 - 前記方法は、さらに、
前記トンネル接合上に別の発光デバイス構造体を成長させるステップ、
を含む、請求項5に記載の方法。 - 前記トンネル接合は、さらに、
前記p++層と前記n++層との間に配置された追加層を含み、かつ、
該追加層は、前記p++層または前記n++層のいずれかと異なる組成である、
請求項2に記載の方法。 - デバイスを成長させるための方法であって、
リモートプラズマ化学気相堆積(RP−CVD)とスパッタリング堆積のうち少なくとも1つによって、成長基板上に水素フリーIII族窒化物のp型領域を成長させるステップと、
前記III族窒化物のp型領域上にIII族窒化物の発光領域を成長させるステップと、
有機金属化学気相成長法(MOCVD)を使用して、前記発光領域上にIII族窒化物のn型領域を成長させるステップと、
を含む、
方法。 - 前記方法は、さらに、
前記成長基板の非III族窒化物材料上にGaNフィルムを配置するステップと、
有機金属化学気相成長法(MOCVD)によって、前記GaNフィルムを成長させるステップと、を含む、
請求項8に記載の方法。 - 前記方法は、さらに、
前記成長基板の非III族窒化物材料上にGaNフィルムを配置するステップと、
RP−CVDとスパッタリング堆積のうち少なくとも1つによって、前記GaNフィルムを成長させるステップと、を含む、
請求項8に記載の方法。 - 前記III族窒化物のp型領域上に発光領域を成長させるステップは、
RP−CVDとスパッタリング堆積のうち少なくとも1つによって、前記発光領域の水素フリーの第1部分を成長させるステップと、
MOCVDによって、前記発光領域の第2部分を成長させるステップと、
を含む、請求項8に記載の方法。 - 前記III族窒化物のp型領域上に発光領域を成長させるステップは、
RP−CVDとスパッタリング堆積のうち少なくとも1つによって、前記III族窒化物の発光領域を成長させるステップ、を含む、
請求項8に記載の方法。 - デバイスを成長させるための方法であって、
成長基板上にp型領域を成長させるステップと、
前記p型領域上に、RP−CVDとスパッタリング堆積のうち少なくとも1つによって、発光領域を成長させるステップと、
前記発光領域上に、RP−CVDとスパッタリング堆積のうち少なくとも1つによって、n型領域を成長させるステップと、
を含み、さらに、
MOCVDによる前記p型領域の成長の後で、前記p型領域をアニールするステップ、を含む、
方法。 - 前記p型領域、前記発光領域、および前記n型領域は、III族窒化物材料でできている、
請求項13に記載の方法。
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