diff --git a/pcb.lua b/pcb.lua
new file mode 100644
index 0000000..7c9d216
--- /dev/null
+++ b/pcb.lua
@@ -0,0 +1,31 @@
+local util = require("data-util");
+
+data:extend({
+  {
+    type = "item",
+    name = "pcb-substrate",
+    icon = "__bzchlorine__/graphics/icons/pcb-substrate.png",
+    icon_size = 128,
+    subgroup = "intermediate-product",
+    order = "b[pcb-s]",
+    stack_size = util.get_stack_size(200),
+  },
+})
+data:extend({
+  {
+    type = "recipe",
+    name = "pcb-substrate",
+    results = {
+      {"pcb-substrate", 1},
+    },
+    ingredients = {
+      {type="fluid", name="epoxy", amount=10},
+      {"plastic-bar", 3},
+    },
+    enabled = false,
+    category = "chemistry",
+    energy_requires = 3,
+  },
+})
+util.replace_some_ingredient("pcb-substrate", "plastic-bar", 1, "silica", 3)
+util.replace_some_ingredient("pcb-substrate", "plastic-bar", 1, "bakelite")