Patent ID: 8899174

Claim:
A device for manufacturing a display device, comprising: a deposition source; a deposition thickness calculator making determination of a deposition thickness of a deposition material deposited on a substrate, and the deposition material being provided by the deposition source; a controller controlling application of power to a heater disposed to heat the deposition source by comparing the deposition thickness determined with a reference thickness, and the controller controlling the power of the heater either once when each substrate is loaded into a deposition chamber or at regular intervals during each period while the deposition material is deposited on the substrate; and a deposition speed measuring sensor measuring a vapor volume of the deposition material that is sublimated from the deposition source with the deposition material filling the deposition chamber, the deposition speed measuring sensor not coexisting in the device for manufacturing the display device with a deposition thickness measurer which irradiates light to a pattern of a thin film that is deposited onto the substrate, receives the light reflected by the pattern of the thin film, and measures a polarization state of the light reflected, wherein the deposition speed measuring sensor comprises a quartz crystal sensor and the deposition speed measuring sensor measures the vapor volume emitted from the deposition source before contacting the substrate.