Patent ID: 9525098
Filing Date: 2016-12-20
CPC Classification: H01L,Y02E,Y02P

Claim Text:
1. A method of manufacturing a solar cell, the method comprising: forming a first doped region of a first conductive type and a second doped region of a second conductive type opposite the first conductive type on a first side of a semiconductor substrate of the first conductive type; forming a first passivation layer on the first doped region and the second doped region, the first passivation layer being formed of silicon nitride (SiNx), silicon oxide (SiOx), or a combination thereof and having a single-layered structure or a multi-layered structure; forming a textured structure on an entire second side of the semiconductor substrate opposite to the first side of the semiconductor substrate; forming a second passivation layer on the second side of the semiconductor substrate; forming an anti-reflection layer on the second passivation layer; removing a portion of the first passivation layer to expose a portion of each of the first and second doped regions; and forming a first electrode electrically connected to the first doped region and a second electrode electrically connected to the second doped region, wherein the forming of the first and second electrodes includes respectively; forming a metal seed layer having a first portion directly contacting one of the first doped region and the second doped region, and a second portion directly contacting the first passivation layer, forming a diffusion barrier layer on the metal seed layer, forming a first conductive layer on the diffusion barrier layer by plating, forming a second conductive layer on an exposed surface of the first conductive layer including a bottom surface and side surfaces of the first conductive layer by plating, wherein the forming of the first and second doped regions includes: forming a first layer containing first impurities of the second conductive type on a portion of the semiconductor substrate to form the second doped region; forming a second layer containing second impurities of the first conductive type on the first layer and the semiconductor substrate to form the first doped region; and diffusing the first impurities of the first layer and the second impurities of the second layer to form the first doped region and the second doped region on the substrate, wherein the first layer is formed both for doping for the second doped region with the first impurities and shielding for the second impurities, and wherein the first doped region and the second doped region are disposed at the same level of the semiconductor substrate.