The large-N limit of N=1 field theories from F theory

We study AdS/CFT correspondence in four-dimensional N = 1 field theories re alized on the world-volume of D3 branes near the intersections between D7 a nd D7' branes in F theory studied by Aharony et al. We consider the compact ification of F theory on elliptically fibered Calabi-Yau threefolds corresp onding to two sets of parallel D7 branes sharing six space-time directions. This can be viewed as orbifolds of six torus T-6 by Z(p) x Z(q) (p,q = 2,3 ,4,6) We find the large-N spectrum of chiral primary operators by exploitin g the property of AdS/CFT correspondence. Moreover, we discuss supergravity solutions for D3 branes in D7 and D7' branes background.