diff --git a/placeram/cli.py b/placeram/cli.py
index ac7fb24..b5cbd95 100644
--- a/placeram/cli.py
+++ b/placeram/cli.py
@@ -239,8 +239,8 @@ def cli(
     odb_in,
 ):
     pdk, scl, blocks = building_blocks.split(":")
-    fill_cells_file = os.path.join(".", "platforms", pdk, "fill_cells.yml")
-    if not os.path.isfile(fill_cells_file):
+    platform_tech_file = os.path.join(".", "platforms", pdk, scl, "tech.yml")
+    if not os.path.isfile(platform_tech_file):
         eprint("Platform %s not found." % pdk)
         exit(os.EX_NOINPUT)
 
@@ -264,7 +264,6 @@ def cli(
             "WARNING: Word length must be a non-zero multiple of 8. Results may be unexpected."
         )
 
-    platform_tech_file = os.path.join(".", "platforms", pdk, scl, "tech.yml")
     platform_tech_config = yaml.safe_load(open(platform_tech_file))
 
     tap_distance = platform_tech_config["tap_distance"]
@@ -272,7 +271,7 @@ def cli(
     for input in [odb_in]:
         check_readable(input)
 
-    fill_cell_data = yaml.load(open(fill_cells_file).read(), Loader=yaml.SafeLoader)
+    fill_cell_data = platform_tech_config["fills"]
 
     placer = Placer(
         odb_in,
diff --git a/platforms/sky130A/fill_cells.yml b/platforms/sky130A/fill_cells.yml
deleted file mode 100644
index 0655728..0000000
--- a/platforms/sky130A/fill_cells.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-# Non-logical Cells
-decap: sky130_\w+__decap_(\d+)
-fill: sky130_\w+__fill_(\d+)
-tap: sky130_\w+__tapvpwrvgnd_(\d+)
-diode: sky130_\w+__diode_(\d+)
diff --git a/platforms/sky130A/sky130_fd_sc_hd/tech.yml b/platforms/sky130A/sky130_fd_sc_hd/tech.yml
index b65aa9a..7b0edf5 100644
--- a/platforms/sky130A/sky130_fd_sc_hd/tech.yml
+++ b/platforms/sky130A/sky130_fd_sc_hd/tech.yml
@@ -1,5 +1,5 @@
 tap_distance: 15
-metal_layers: 
+metal_layers:
   hor-layer: met3
   ver-layer: met2
   rt-max-layer: met4
@@ -7,11 +7,11 @@ site:
   width: 0.46
   height: 2.72
   name: unithd
-tie: 
+tie:
   tie_lo_cell: sky130_fd_sc_hd__conb_1
   tie_lo_port: LO
   tie_hi_cell: sky130_fd_sc_hd__conb_1
-  tie_hi_port: HI  
+  tie_hi_port: HI
 sta:
   driving_cell:
     name: sky130_fd_sc_hd__inv_8
@@ -30,3 +30,8 @@ sta:
       "1024x*": 16.5
       "2048x*": 16.5
     rf: {}
+fills:
+  decap: sky130_fd_sc_hd__decap_(\d+)
+  fill: sky130_fd_sc_hd__fill_(\d+)
+  tap: sky130_fd_sc_hd__tapvpwrvgnd_(\d+)
+  diode: sky130_fd_sc_hd__diode_(\d+)