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单词 Pulsed laser deposition
释义

Pulsed laser deposition

中文百科

脉冲激光沉积

脉冲雷射沉积(Pulsed Laser Deposition,PLD),也被称为脉冲雷射烧蚀(pulsed laser abalation,PLA)为物理气相沉积的一种(Physical Vapor Deposition,PVD)

是一种利用聚焦后的高功率脉冲雷射于真空腔体中对靶材进行轰击,由于雷射能量极强,会将靶材汽化形成电浆蕈状团(plasma plume),并沉淀于基板上形成薄膜。

于镀膜可于高真空、超高真空或通入工作气体(如欲沉积氧化物薄膜,通常会通入氧气作为其工作气体)的环境下进行。

于脉冲雷射沉积的过程中,雷射的能量被靶材吸收之后,能量首先激发靶材内部的电子跃迁,之后再转成热能等使靶材汽化形成电浆态,于电浆云中,包含分子、原子、电子、离子、微粒、融球体等物质。

英语百科

Pulsed laser deposition 脉冲激光沉积

A plume ejected from a SrRuO3 target during pulsed laser deposition.
One possible configuration of a PLD deposition chamber.
Thin films of oxides are deposited with atomic layer precision using pulsed laser deposition. In this picture, a high-intensity pulsed laser shoots a rotating white disk of Al2O3 (alumina). The laser pulse creates a plasma explosion, visible as the purple cloud. The plasma cloud from the alumina expands towards the square substrate, made of SrTiO3, where it condenses and solidifies, building up one atomic layer at a time. The substrate is mounted on a heating plate, glowing red at a temperature of 650 °C, to improve the crystallinity of the alumina thin film.

Pulsed laser deposition (PLD) is a physical vapor deposition (PVD) technique where a high-power pulsed laser beam is focused inside a vacuum chamber to strike a target of the material that is to be deposited. This material is vaporized from the target (in a plasma plume) which deposits it as a thin film on a substrate (such as a silicon wafer facing the target). This process can occur in ultra high vacuum or in the presence of a background gas, such as oxygen which is commonly used when depositing oxides to fully oxygenate the deposited films.

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更新时间:2025/6/23 3:08:42