The 28-year-old recorded his first 147 in competition play to take an 8-7 lead in his quarter-final clash against Peter Ebdon (who had just missed his own chance for a 147, missing the 15th black)
It came just a day after Ronnie O'Sullivan's maximum and is the first time there have been two 147 breaks in the same ranking tournament.
O'Sullivan will now have to share the £147,000 bonus for a maximum and the £10,000 for the highest break of the tournament, which could affect his plans to buy a Bentley later this year.
After claiming his 147 on Monday, O'Sullivan had said: "That money gives me a few options in the summer. I'll be getting a Bentley convertible now - I've been dying to get one!"
And in response to O'Sullivan's comment, Carter joked: "I'm going to buy a Ford Focus convertible, I've been dying to get one!"
http://news.bbc.co.uk/sport1/hi/othe...er/7374601.stm
147 breaks at the Crucible now stand like this:
1983 Cliff Thorburn
1992 Jimmy White
1995 Stephen Hendry
1997 Ronnie O'Sullivan
2003 Ronnie O'Sullivan
2005 Mark Williams
2008 Ronnie O'Sullivan
2008 Ali Carter