  Magic-angle twisted bilayer graphene (MATBG) stands as one of the most
versatile materials in condensed-matter physics due to its hosting of a wide
variety of exotic phases while also offering convenient tunability. However,
the fabrication of MATBG is still manual, and remains to be a challenging and
inefficient process, with devices being highly dependent on specific
fabrication methods, that often result in inconsistency and variability. In
this work, we present an optimized protocol for the fabrication of MATBG
samples, for which we use deterministic graphene anchoring to stabilize the
twist-angle, and a careful bubble removal techniques to ensure a high
twist-angle homogeneity. We use low-temperature transport experiments to
extract the average twist-angle between pairs of leads. We find that up to 38
percent of the so fabricated devices show micrometer square sized regions with
a twist-angle in the range 1.1 plus/minus 0.1 degrees, and a twist-angle
variation of only 0.02 degrees, where in some instances such regions were up to
36 micrometer square large. We are certain that the discussed protocols can be
directly transferred to non-graphene materials, and will be useful for the
growing field of moire materials.
