Question

When literature sources mention materials by their crystallographic orientation, what does that actually mean? For instance: “the device was fabricated using a (100) Si wafer.” Answer by drawing a picture.

Answer 1

(100) represents the plane in consideration.

The general notation (h,k,l) are the Miller indices of the plane where 1/h, 1/k and 1/l are the points on the plane where the plane intersects x,y and z axes respectively.

here, h = 1, k = l =0

so, the plane will intersect at x = 1/1 = 1 unit and y = z = infinity

therefore, the given plane will be parallel to yz plane at it intersects at x = 1.

To draw this, simply draw a plane parallel to yz plane at x=1.