In brain science and psychology, one of the most important purposes of recent studies about neural network, biological circuit in brain, is to establish a method of treatment for the central nervous system disease, such as Alzheimer. "Optogenetics" is a new technique for analyzing neural network. In optogenetics, neurons in a neural network is stimulated and controlled by visible lights. In this paper, we propose an integrated microchip having micro electrodes and micro lenses. The proposed microchip stimulates a brain slice sample with two focused lights which have different affection to the neuron, and measures the electrical reaction of the neural network.
