Hi Win 7 x64 and welcome to the forum!
scaramonga is correct, this is normal.
If you want to avoid the creation of the 200MB partition, you have to pre-format the drive where you want to install the OS to NTFS and make sure that there's no unallocated space.
The reason why Windows 7 creates that partition is for the Windows Recovery Environment (WinRE). This partition holds system files and bootable files essential to boot the Windows 7 properly if you needed to do recovery on the system due to corruption.