摘要:
Described is a continuous electroless deposition method and a system to form a solar cell buffer layer with a varying composition through its thickness are provided. The composition of the buffer layer is varied by varying the composition of a chemical bath deposition solution applied onto an absorber surface on which the buffer layer with varying composition is formed. In one example, the buffer layer with varying composition includes a first section containing CdS, a second section containing CdZnS formed on top of the already deposited CdS, and a third section containing ZnS is formed on the second section All the process steps are applied in a roll-to-roll fashion. In another example, a transparent conductive layer including a first transparent conductive film such as aluminum doped zinc oxide and a second transparent conductive film such as indium tin oxide is deposited over the buffer layer with the varying composition.
摘要:
A solar cell including a high electrical resistivity transparent layer formed on a CdS buffer layer is provided. The high electrical resistivity transparent layer includes an intrinsic oxide film formed on the buffer layer and an intermediate oxide film formed on the intrinsic oxide film. The intrinsic oxide film includes undoped zinc oxide and has a thickness range of 10 to 40 nm. The intermediate oxide film includes semi-intrinsic zinc oxide doped with aluminum and has a thickness range of 50-150 nm. The intermediate oxide film has an aluminum concentration of less than 1000 ppm.
摘要:
In one embodiment, a continuous electroless deposition method and a system to form a solar cell buffer layer with a varying composition through its thickness are provided. The composition of the buffer layer is varied by varying the composition of a chemical bath deposition solution applied onto an absorber surface on which the buffer layer with varying composition is formed. In one example, the buffer layer with varying composition includes a first section containing CdS, a second section containing CdZnS formed on top of the already deposited CdS, and a third section containing ZnS is formed on the second section All the process steps are applied in a roll-to-roll fashion. In another embodiment, a transparent conductive layer including a first transparent conductive film such as aluminum doped zinc oxide and a second transparent conductive film such as indium tin oxide is deposited over the buffer layer with the varying composition.
摘要:
A magnetoresistive sensor having a lead overlay defined trackwidth and a pinned layer that extends beyond the stripe height defined by the free layer of the sensor. The extended pinned layer has a strong shape induced anisotropy that maintains pinning of the pinned layer moment. The extended portion of the pinned layer has sides beyond the stripe height that are perfectly aligned with the sides of the sensor within the stripe height. This perfect alignment is made possible by a manufacturing method that uses a mask structure for more than one manufacturing phase, eliminating the need for multiple mask alignments. The lead overlay design allows narrow, accurate trackwidth definition.
摘要:
A magnetic head having an improved read head structure. The read head includes a free magnetic layer with hard bias elements disposed proximate its ends, where the hard bias elements include an improved hard bias magnetic grain structure. This is accomplished by fabricating the hard bias element as a bilayer structure having a first hard bias sublayer, a nonmagnetic midlayer and a second hard bias sublayer. The midlayer is preferably composed of a nonmagnetic material such as chromium, and the hard bias sublayers are composed of a magnetic material such as CoPtCr. Each sublayer is formed with its own magnetic grains, and because there are two sublayers, the hard bias element is fabricated with approximately twice the number of magnetic grains as the prior art single layer hard bias element.
摘要:
An apparatus having improved hard bias properties of layers of a magnetoresistance sensor is disclosed. Properties of the hard bias layer are improved using a seedlayer structure that includes at least a layer of silicon and a layer comprising chromium or chromium molybdenum. Further, benefits are achieved when the seedlayer structure includes a layer of tantalum.
摘要:
Described are new ohmic contact materials and diffusion barriers for Group IBIIIAVIA based solar cell structures, which eliminate two way diffusion while preserving the efficient ohmic contacts between the substrate and the absorber layers.
摘要:
Methods and apparatus provide improved properties of a hard bias layer of a magnetoresistance sensor. The properties of the hard bias layer are improved by using a multilayer seed structure that includes a chromium-containing layer disposed between two tungsten-containing layers.
摘要:
A seedlayer structure for a high coercivity hard bias layer is disclosed, having at least one bi-layer seedlayer, including a CrMo layer, and a W layer fabricated on the CrMo layer. A hard bias layer is fabricated on the bi-layer seedlayer. Preferably, the seedlayer structure includes two bi-layer seedlayers, which including a first CrMo layer, a first W layer fabricated on the first CrMo layer, a second CrMo layer fabricated on the first W layer, and a second W layer fabricated on the second CrMo layer. Also disclosed is a high coercivity hard bias stack structure, a magnetic read head for a disk drive having a high coercivity hard bias stack structure and a method for fabricating a coercivity hard bias layer for a magnetic read head.
摘要:
In one illustrative example of the invention, a spin valve sensor includes a free layer structure; an antiparallel (AP) pinned layer structure; and a non-magnetic electrically conductive spacer layer in between the free layer structure and the AP pinned layer structure. The AP pinned layer structure includes a first AP pinned layer; a second AP pinned layer; and an antiparallel coupling (APC) layer formed between the first and the second AP pinned layer. One of the first and the second AP pinned layers consists of cobalt and the other one includes cobalt-iron. The pure cobalt may be provided in the first AP pinned layer or the second AP pinned layer. Advantageously, the use of cobalt in one of the AP pinned layers increases the Δr/R of the spin valve sensor.