Patent ID: 8726835

Claim:
An apparatus, CBD (chemical bath deposition) reactor, for forming thin films on plane substrate surfaces by a CBD process, comprising: a substrate loading unit; a substrate unloading unit; one or more modular segment(s) installed between said substrate loading and unloading units to form a closed chamber of this reactor; wherein said modular segment includes a front wall, a back wall, a top roof and a bottom floor, and the modular segments on ends include a sidewall on one end and another sidewall on the other end; wherein said modular segments on ends possess one or more vertically cut slit(s) on each sidewall to allow the plane substrates vertically going through; wherein said modular segment includes one or more rollers close and parallel to its back wall to vertically, or with 0-30 degrees off the vertical, deliver said plane substrates; wherein said closed reactor chamber is separated into three sections with two boards: pre-cleaning section on one end close to the substrate loading unit, rinsing section on the other end close to the substrate unloading unit, and reaction chamber including one or more modular segment(s) in the middle as a main section; wherein one or more spray combination(s) including a chemical resistant pump, one or more solution pipe(s) and one or more spray nozzle(s) are installed inside said reaction chamber to spray gradually aged reaction solution to cover said plane substrate's front surfaces; wherein the solution sprayed onto said substrate surfaces flows downward to the floor into a groove where accumulated aged solution flows synchronously along the same direction as the substrates move; wherein one or more board(s) crossover the entire chamber is (are) installed in front of the top edge of said substrates to prevent the solution from spraying to their backsides; and wherein one or more row(s) of air knives crossover the entire chamber are installed in back of the bottom edge of said substrates to maintain their backsides drying.