This dataset contains the raw data used for the publication: ------------------------------------------------------------------------------------------------------------------------------------------------------- "The top performer: towards optimized parameters for Reduced graphene oxide uniformity by Spin coating" by C. Reiner-Rozman, R. Hasler, J. Andersson, T. Rodrigues, A. Bozdogan and P. Aspermair -------------------------------------------------------------------------------------------------------------------------------------------------------- It consists of the SEM images (in .tif format) and the determined surface coverages (in .dat format) as well as the measured electrical data (in .dat format) of the prepared graphene field-effect transistor chips. Headers/information in the data files are in English. When using this data in any form please refer to the above-mentioned publication. The data is structured according to the figures of the paper. Each folder contains the data relevant to validate the results presented in the respective figure of the publication. The files are labeled according to the following description: "measurement-type"_"chip-number"_"GO-concentration"_"spin-coating speed" "measurement-type": SEM, IDVG, baseline "chip-number": an increasing number of fabricated device (only used when needed) "GO-concentration": 143/214/285 µg/mL of graphene oxide (GO) in solution "spin-coating speed": in rpm