NOVELTY - Preparing solar cell module (20) involves subjecting pre-lamination assembly to vacuum force of 1-100 torr within a closed chamber, where one side of assembly is exposed to first heat source, where assembly comprises solar cell layer (14) containing electrically interconnected solar cells and has front sun-facing side/back non-sun-facing side, a thermoplastic sheet having polymer selected from acid copolymers and/or their ionomers, and glass sheet positioned adjacent to the sheet; increasing heat source temperature; releasing vacuum force; and exposing assembly to second heat source.    USE - In the preparation of solar cell module, where the solar cells are wafer-based solar cells selected from crystalline silicon and multi-crystalline silicone based solar cells or are thin film solar cells selected from amorphous silicon, microcrystalline silicon, cadmium telluride, copper indium selenide, copper indium/gallium diselenide, light absorbing dyes and organic semiconductors based solar cells (claimed) used as energy source.    ADVANTAGE - The manufacturing process is improved non-autoclave lamination process that effectively manufactures solar cell module. The method is a more efficient lamination process for manufacturing glass/glass type solar cell modules that incorporates acid copolymers or ionomers as encapsulant material. The use of improved non-autoclave lamination process accelerates module production speed by permitting a reduction in the time period required for the heating step that is performed within the heated chamber of the laminator. This promotes efficiency in assembly line operations, which are common industry practices in the production of solar cell modules. The process permits the first three steps to be conducted within a time frame that is considerably shorter than that which is usual in solar cell lamination procedures.    DETAILED DESCRIPTION - Preparation of solar cell module (20) involves subjecting a pre-lamination assembly to a vacuum force of 1-100 torr within a closed chamber, where one side of the assembly is exposed to a first heat source, the pre-lamination assembly is optionally heated to a temperature of greater than or equal to 25 degrees C, and the pre-lamination assembly is maintained at the vacuum force and optional temperature conditions for 1-15 minutes, and where the pre-lamination assembly comprises a solar cell layer (14) comprising at least one electrically interconnected solar cell, where the pre-lamination assembly has a front sun-facing side and a back non-sun-facing side, at least one thermoplastic sheet that is positioned to one side of the solar cell layer and comprises a thermoplastic polymer selected from acid copolymers and/or ionomers of acid copolymers, and at least one glass sheet that is positioned adjacent to the at least one thermoplastic sheet; increasing the temperature of the first heat source to heat the pre-lamination assembly to 50-150 degrees C while applying a pressure of about 1 atm to a surface of the pre-lamination assembly within the closed chamber, and maintaining the pre-lamination assembly at the vacuum, temperature and pressure conditions for 1-15 minutes; releasing the vacuum force within the chamber and exposing the pre-lamination assembly to ambient pressure; and further exposing at least one side of the pre-lamination assembly to a second heat source which heats the pre-lamination assembly to a temperature of 70-150 degrees C for 1 minute to 24 hours to form the solar cell module. The first three steps are conducted within a vacuum laminator chamber with the first heat source being a heated platen positioned at one side of the vacuum laminator; and the second heat source used in further exposing step is selected from forced air ovens, convection ovens, radiant heat sources, infrared light, microwave ovens and/or hot air. The solar cell layer further comprises a substrate as an outermost layer of the pre-lamination assembly at the back non-sun-facing side and upon which the thin film solar cells are deposited; or a superstrate as an outermost layer of the pre-lamination assembly at the front sun-facing side and upon which the thin film solar cells are deposited. The pre-lamination assembly consists of in order of position: an incident layer (10) formed of the at least one glass sheet, a front encapsulant layer (12) formed of the at least one thermoplastic sheet, the solar cell layer, back encapsulant layer (16) formed of a second thermoplastic sheet, and a backing layer (18) formed of a second glass sheet.    DESCRIPTION OF DRAWING(S) - The figure shows cross-sectional view of a glass/glass type wafer-based solar cell module prepared by preparation process.    Glass incident layer (10)    Front encapsulant layer (12)    Solar cell layer (14)    Back encapsulant layer (16)    Glass backing layer (18)    Solar cell module (20)