Semiconductor laser
    1.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4651322A

    公开(公告)日:1987-03-17

    申请号:US754195

    申请日:1985-07-10

    CPC分类号: H01S5/2238 H01S5/028

    摘要: In a laser of such type that the distribution of the effective refractive index varies in a direction which is along the face of its active layer and perpendicular to the direction of the laser light transmission, thereby defining the active region to be between a pair of refractive index changing zones, the refractive indexes of a pair of end surfaces of a laser resonator (i.e. the active region) is made smaller than the intrinsic refractive indexes of the cleavage face of the active layer.

    摘要翻译: 在这种类型的激光器中,有效折射率的分布沿着其有源层的面并且垂直于激光传输的方向的方向变化,从而将有源区域限定在一对折射率 折射率变化区域,使激光谐振器(即有源区域)的一对端面的折射率小于有源层的解理面的固有折射率。

    Semiconductor laser
    2.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4432092A

    公开(公告)日:1984-02-14

    申请号:US270351

    申请日:1981-06-04

    摘要: A very narrow current injection region (16") is made by means of terrace-shaping of the surface of the current limiting layer (13) forming a step thereon, the current limiting layer being on the epitaxially grown double hetero structure layers (10, 11 and 12) including the active layer (11). By so terrace-shaping, when Zn as a p-type impurity to form the current injection region (16) is diffused from the surface of the current limiting layer (13), the diffused region is formed to have a deeper part (16") and a shallower part (16'), and the deeper part (16") can be made very narrow by selecting the position of the stripe-shaped diffused region with respect to the step (14).

    摘要翻译: 通过对在其上形成台阶的限流层(13)的表面进行露台成形来制造非常窄的电流注入区域(16“),限流层位于外延生长的双异质结构层(10” ,11和12),包括有源层(11)。 通过这样的露台成形,当形成电流注入区域(16)的作为p型杂质的Zn从限流层(13)的表面扩散时,扩散区域形成为具有较深部分(16' ')和较浅部分(16'),并且通过相对于台阶(14)选择条形扩散区域的位置,可以使较深部分(16“)非常窄。

    Method of manufacturing semiconductor device
    3.
    发明授权
    Method of manufacturing semiconductor device 失效
    制造半导体器件的方法

    公开(公告)号:US4675074A

    公开(公告)日:1987-06-23

    申请号:US761023

    申请日:1985-07-31

    摘要: The invention provides a chemical etching method for a semiconductor device, which comprises a step of forming a first layer of Ga.sub.1-x Al.sub.x As (0.ltoreq.x . The slope angle of etch face of the second layer depends on the mol fraction y of the second layer, and the slope angle of etch face of the first layer depends on the mol fraction y of the second layer and the mol fraction x of the first layer. These facts are best utilized in the invention so that the etch profile of the first layer may have a desired slope angle. By utilizing this chemical etching method it is possible to produce by chemical etching a semiconductor laser having a flat cavity facet perpendicular to a junction; it is also possible to provide an inner stripe type semiconductor laser having grooves whose side walls are perpendicular.

    摘要翻译: 本发明提供一种用于半导体器件的化学蚀刻方法,其包括形成具有表面(100)的第一层Ga 1-x Al x As(0 的方向化学蚀刻所述层的步骤。 第二层的蚀刻面的倾斜角取决于第二层的摩尔分数y,第一层的蚀刻面的倾斜角取决于第二层的摩尔分数y和第一层的摩尔分数x 层。 这些事实在本发明中最好地利用,使得第一层的蚀刻轮廓可以具有期望的倾斜角。 通过利用这种化学蚀刻方法,可以通过化学蚀刻具有垂直于结的平坦腔面的半导体激光器来制造; 也可以提供具有侧壁垂直的槽的内条型半导体激光器。

    Terraced substrate semiconductor laser
    4.
    发明授权
    Terraced substrate semiconductor laser 失效
    梯形衬底半导体激光器

    公开(公告)号:US4488306A

    公开(公告)日:1984-12-11

    申请号:US358104

    申请日:1982-03-15

    摘要: In a semiconductor laser of terraced substrate type, comprising on a terraced substrate (11) of n-GaAs substrate, a first clad layer (12) of n-GaAlAs, an active layer (13) of non-doped GaAlAs, a second clad layer (14) of p-GaAlAs and a current limiting layer (15) of n-GaAs, and further thereon a thick overriding layer (19) of n-GaAlAs with strip shaped opening (191), are epitaxially formed, and a current injection layer (16) is formed by Zn diffusion through the opening (191) in a manner one corner (161) of the injection front penetrate the current limiting layer (15) and reaches the second clad layer (14). By means of thick overriding layer (19), shortcircuiting between the active layer (13) and a p-side electrode (7) is prevented.

    摘要翻译: 在梯形衬底类型的半导体激光器中,包括在n-GaAs衬底的梯形衬底(11)上,n-GaAlAs的第一覆盖层(12),非掺杂GaAlAs的有源层(13),第二覆层 p-GaAlAs的层(14)和n-GaAs的限流层(15),并且还具有带条形开口(191)的n-GaAlAs厚的覆盖层(19),外延形成电流 注入层(16)以注入前沿的一个角部(161)穿过开口(191)的Zn扩散形成,穿过限流层(15)并到达第二覆层(14)。 通过厚覆盖层(19),防止有源层(13)和p侧电极(7)之间的短路。

    Semiconductor laser
    5.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4377865A

    公开(公告)日:1983-03-22

    申请号:US218442

    申请日:1980-12-19

    IPC分类号: H01S5/20 H01S5/223 H01S3/19

    摘要: On an n-type semiconductor substrate having a ridge part of stripe-shaped pattern, the following layers are formed by liquid phase sequential epitaxial growth: an undoped active layer; a p-type clad layer; and an n-type isolation layer. Thereafter, a Cd impurity is diffused in the isolation layer in a stripe-shaped pattern at the position above the ridge part, thereby forming a p+-type conduction region in the central part of the isolation layer. By forming the stripe-shaped ridge part on the substrate overriding the active layer, the injected current is effectively confined to the lasing region which is the thinner part of the active layer and is on the ridge part. Therefore the threshold current is decreased. Accordingly, the light lased in the active layer is effectively confined in a stripe-shaped lasing region thereof, and a stable transverse mode of lasing is obtainable.

    摘要翻译: 在具有条状图案的脊部的n型半导体衬底上,通过液相顺序外延生长形成以下层:未掺杂的有源层; p型覆层; 和n型隔离层。 此后,Cd隔离层在脊部上方的位置以条状图案扩散到隔离层,由此在隔离层的中央部形成p +型导电区​​域。 通过在衬底上形成条状脊部来覆盖有源层,注入的电流被有效地限制在作为有源层的较薄部分并且在脊部上的激光区域。 因此,阈值电流降低。 因此,在有源层中照射的光被有效地限制在条状的激光区域中,并且可以获得稳定的横模激光。

    Semiconductor laser
    6.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4546478A

    公开(公告)日:1985-10-08

    申请号:US614390

    申请日:1984-05-25

    摘要: A mounting of semiconductor laser chip on a heat sink or metal mount is improved so as to enable high accuracy of position and direction. A heat sink or metal mount, on which a semiconductor laser chip is mounted, comprises two parts, namely a main mount or larger portion and a sub-mount or smaller portion. The semiconductor laser chip is soldered by a solder layer on the sub-mount utilizing a microscope so as to assure an accurate position and an accurate direction with respect to the sub-mount. Then, the sub-mount is soldered on the main mount by a solder layer with an accurate relation both in position and direction by engaging a linear ridge as a first engaging means provided on the upper face of the main mount with a straight groove and a rear end face as a second engaging means, or by engaging a square recess as a first engaging means and the square bottom of the sub-mount as a second engaging means with each other. As a result of the above-mentioned structure, accurate position and direction of the semiconductor laser chip with respect to the mount is easily obtainable with a high yield.

    摘要翻译: 提高半导体激光芯片在散热片或金属安装座上的安装,以实现高精度的位置和方向。 安装有半导体激光芯片的散热器或金属安装件包括两部分,即主安装件或更大部分和副安装件或更小部件。 利用显微镜将半导体激光芯片通过焊接层焊接在子座上,以确保相对于子安装座的精确位置和准确的方向。 然后,通过将位于主要安装座的上表面上设置的第一接合装置的直线状脊线与直槽相啮合,通过焊接层将焊接层焊接在主安装座上,焊接层的位置和方向都精确, 后端面作为第二接合装置,或者通过将作为第一接合装置的方形凹槽和副安装座的方形底部彼此接合作为第二接合装置。 作为上述结构的结果,可以容易地以高产率获得半导体激光器芯片相对于安装座的精确位置和方向。

    Method of making a semiconductor laser by liquid phase epitaxial growths
    7.
    发明授权
    Method of making a semiconductor laser by liquid phase epitaxial growths 失效
    通过液相外延生长制造半导体激光器的方法

    公开(公告)号:US4380861A

    公开(公告)日:1983-04-26

    申请号:US266134

    申请日:1981-05-21

    IPC分类号: H01S5/223 H01L21/208

    CPC分类号: H01S5/2238

    摘要: In a semiconductor laser comprising an active layer epitaxially formed on a semiconductor substrate and at least a current limiting layer which defines a current injection region of a stripe shape,the improvement is that said substrate has a terrace part on its principle face,said active layer has two parallel bending parts defining a stripe shape active region facing said current injection region in between andsaid stripe shape active region is disposed with a specified angle to said principle face.

    摘要翻译: 在包括在半导体衬底上外延形成的有源层和限定条形电流注入区的至少限流层的半导体激光器中,改进之处在于,所述衬底在其原理面上具有露台部分,所述有源层 具有两个平行的弯曲部分,其限定面向所述电流注入区域的条状形状有源区域,并且所述条形形状有源区域以与所述原理面形成特定角度设置。

    Semiconductor laser
    8.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4371967A

    公开(公告)日:1983-02-01

    申请号:US215665

    申请日:1980-12-12

    摘要: In a semiconductor laser which has epitaxial layers including an active layer on a semiconductor substrate, a buffer layer is formed neighboring the active layer, in order to prevent undesirable diffusion of a highly diffusing dopant (Zn) into the active layer from an adjacent layer such as the second clad layer. The buffer layer has the same conductivity as that of the adjacent layer, has a broader energy gap than the active layer, and the dopant of the buffer layer is less diffusing than that of the adjacent layer.

    摘要翻译: 在半导体衬底上具有包括有源层的外延层的半导体激光器中,形成与有源层相邻的缓冲层,以便防止高度扩散的掺杂​​剂(Zn)从相邻层(例如 作为第二包覆层。 缓冲层具有与相邻层相同的导电性,具有比有源层更宽的能隙,并且缓冲层的掺杂剂比相邻层的扩散更少。

    Semiconductor laser
    10.
    发明授权
    Semiconductor laser 失效
    半导体激光器

    公开(公告)号:US4383319A

    公开(公告)日:1983-05-10

    申请号:US183413

    申请日:1980-09-02

    CPC分类号: H01S5/32308 H01S5/3201

    摘要: In a laser comprising a GaAs substrate, an active layer of GaAlAs put between a first and a second clad layers, a buffer layer is disposed between said first clad layer and said substrate, and thermal expansion coefficient of the buffer layer is selected smaller than that of said active layer; thereby an internal stress of the active layer is released and lifetime of the laser is very much prolonged.

    摘要翻译: 在包括GaAs衬底的激光器中,GaAlAs的有源层放置在第一和第二覆盖层之间,缓冲层设置在所述第一覆盖层和所述衬底之间,并且缓冲层的热膨胀系数被选择为小于 的所述活性层; 从而释放有源层的内部应力,并且激光器的寿命非常长。