CMM series 320 LF 90° SMT (3-row right angle SMT connector) extension from Nicomatic is the most compact connector existing on the market today in its category (2mm pitch - up to 120 contacts).
The SMT technology applied to low profile connectors is usually quite problematic when it gets to industrialize serial production. A 2-row connector version was already available. However, there is a big gap between a 2 and 3-row connector if you want to apply the 90° SMT technology. What makes it so difficult? Well, you need to guarantee planeity for all contacts to be soldered on 3 axis and remain in especially narrow tolerances!