diff --git a/src/kyupy/techlib.py b/src/kyupy/techlib.py
index c686083..95d23d9 100644
--- a/src/kyupy/techlib.py
+++ b/src/kyupy/techlib.py
@@ -134,7 +134,7 @@ class TechLibNew:
                 circuit.substitute(n, self.cells[n.kind][0])
 
 
-nangate = TechLibNew(r"""
+NANGATE = TechLibNew(r"""
 FILLCELL_X{1,2,4,8,16,32} ;
 
 LOGIC0_X1 output(Z) Z=__const0__() ;
@@ -207,7 +207,7 @@ DLL_X{1,2} input(D,GN) output(Q) G=INV1(GN) Q=LATCH(D,G) ;
 # SAED90nm and SAED32nm libraries.
 # not included here: negative-edge flip-flops, tri-state, latches, clock gating, level shifters
 
-saed90 = TechLibNew(r"""
+SAED90 = TechLibNew(r"""
 NBUFFX{2,4,8,16,32}$ input(INP) output(Z) Z=BUF1(INP) ;
 AOBUFX{1,2,4}$       input(INP) output(Z) Z=BUF1(INP) ;
 DELLN{1,2,3}X2$      input(INP) output(Z)Z=BUF1(INP) ;
@@ -294,7 +294,7 @@ LATCHX{1,2}$ input(D,CLK) output(Q,QN) Q=LATCH(D,CLK) QN=INV1(Q) ;
 """.replace('$','{,_LVT,_HVT}'))
 
 
-saed32 = TechLibNew(r"""
+SAED32 = TechLibNew(r"""
 NBUFFX{2,4,8,16,32}$ input(A) output(Y) Y=BUF1(A) ;
 AOBUFX{1,2,4}$       input(A) output(Y) Y=BUF1(A) ;
 DELLN{1,2,3}X2$      input(A) output(Y) Y=BUF1(A) ;