A driver circuit for use with a passive matrix or active matrix electro-optical display device such as a liquid crystal display is fabricated to occupy a reduced area. A circuit (stick crystal) having a length substantially equal to the length of one side of the matrix of the display device is used as the driver circuit. The circuit is bonded to one substrate of the display device, and then the terminals of the circuit are connected with the terminals of the display device. Subsequently, the substrate of the driver circuit is removed. The driver circuit can be formed on a large-area substrate such as a glass substrate, while the display device can be formed on a lightweight material having a high shock resistance such as a plastic substrate.