How to create an invisible folder - folder without a name

1- create a new folder
2- double clic on the folder to rename it (or right clic the folder and choose rename)
3- delete the old name
4- Press ALT+01696 (on the numbering pad please)
(it means press Alt and without releasing it type 0196 on your num pad)
5- release Alt and press enter.

Now you have a folder without a name -