stɹˈɪktli spˈiːkɪŋ, ðə slˈoʊ tɹænsˈɪʃən fɹʌm lˈaɪnʌvsˈaɪt tə skˈæɾɚd dˌɛpəzˈɪʃən ɪz dɪtˈɜːmɪnd nˌɑːt ˈoʊnli baɪ pɹˈɛʃɚ ɔːɹ mˈiːn fɹˈiː pˈæθ bˌʌt ˈɔːlsoʊ baɪ sˈoːɹstəsˈʌbstɹeɪt dˈɪstəns.
Strictly speaking, the slow transition from line-of-sight to scattered deposition is determined not only by pressure (or mean free path) but also by source-to-substrate distance.