Like triads, the pattern of scale tone 7th chord types remains the same for every key. The pattern is summarized below. The minor 7 flat 5 chord is also sometimes called a half diminished chord (N7).
The following chart shows scale tone 7th chords in all keys. If you intend to play Jazz, or any kind of Fusion music, it is essential to memorize all these chords. Work through each key and then take a simple progression and play it in every key. Then try a longer progression, then a song containing the various 7th chord types. The more you do this, the easier it gets.