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Donor doping of HgCdTe for LWIR and MWIR structures fabricated with ion milling

Identifieur interne : 000165 ( Russie/Analysis ); précédent : 000164; suivant : 000166

Donor doping of HgCdTe for LWIR and MWIR structures fabricated with ion milling

Auteurs : RBID : Pascal:09-0211340

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English descriptors

Abstract

Ion milling was used to establish the minimum donor doping level Nmd required for obtaining n-regions with reproducible electron concentration in HgCdTe-based LWIR and MWIR device structures fabricated with ion treatment. The experiments were performed on n-type films grown by molecular beam epitaxy, un-doped and in situ doped with indium with the concentration NIn = 5 × 1014-1017 cm-3. A study of the electrical properties of the milled films showed that Nmd comprised ∼2 x 1015 cm-3 for the LWIR and ∼5 × 1015 cm-3 for the MWIR films. In the films with NIn exceeding these critical values, the electron concentration after the milling strictly followed the doping. A need for consideration of the disintegration of the milling-induced defects is also shown.

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Pascal:09-0211340

Le document en format XML

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<term>Electrical characteristic</term>
<term>Electron density</term>
<term>Far infrared radiation</term>
<term>In situ</term>
<term>Indium</term>
<term>Ion beam etching</term>
<term>Mercury tellurides</term>
<term>Microelectronic fabrication</term>
<term>Molecular beam epitaxy</term>
<term>Ternary compound</term>
<term>n type semiconductor</term>
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<term>In situ</term>
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<front>
<div type="abstract" xml:lang="en">Ion milling was used to establish the minimum donor doping level N
<sub>md</sub>
required for obtaining n-regions with reproducible electron concentration in HgCdTe-based LWIR and MWIR device structures fabricated with ion treatment. The experiments were performed on n-type films grown by molecular beam epitaxy, un-doped and in situ doped with indium with the concentration N
<sub>In</sub>
= 5 × 10
<sup>14</sup>
-10
<sup>17</sup>
cm
<sup>-3</sup>
. A study of the electrical properties of the milled films showed that N
<sub>md</sub>
comprised ∼2 x 10
<sup>15</sup>
cm
<sup>-3</sup>
for the LWIR and ∼5 × 10
<sup>15</sup>
cm
<sup>-3</sup>
for the MWIR films. In the films with N
<sub>In</sub>
exceeding these critical values, the electron concentration after the milling strictly followed the doping. A need for consideration of the disintegration of the milling-induced defects is also shown.</div>
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<s0>Ion milling was used to establish the minimum donor doping level N
<sub>md</sub>
required for obtaining n-regions with reproducible electron concentration in HgCdTe-based LWIR and MWIR device structures fabricated with ion treatment. The experiments were performed on n-type films grown by molecular beam epitaxy, un-doped and in situ doped with indium with the concentration N
<sub>In</sub>
= 5 × 10
<sup>14</sup>
-10
<sup>17</sup>
cm
<sup>-3</sup>
. A study of the electrical properties of the milled films showed that N
<sub>md</sub>
comprised ∼2 x 10
<sup>15</sup>
cm
<sup>-3</sup>
for the LWIR and ∼5 × 10
<sup>15</sup>
cm
<sup>-3</sup>
for the MWIR films. In the films with N
<sub>In</sub>
exceeding these critical values, the electron concentration after the milling strictly followed the doping. A need for consideration of the disintegration of the milling-induced defects is also shown.</s0>
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<s5>03</s5>
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<s5>03</s5>
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<s5>06</s5>
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<s5>25</s5>
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<s5>26</s5>
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