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--- intro_pcb [2026/04/13 10:20] – [Perimeter] marie
+++ intro_pcb [2026/04/17 10:33] (current) – [Definition] marie
@@ Line 74: / Line 74: @@
 #### How many sub-parts does the system consist of?
-The system is composed of one main part, the board itself, composed itself of a succession of layers of substrate, insulating material and copper traces. When the PCB has a rigid-flex structure, we can consider that it is composed of a set of rigid PCB board, connected via a set of flexible PCB board.
+The system is composed of one main part, the board itself, composed itself of a succession of layers of substrate, insulating material and copper traces. When the PCB has a rigid-flex structure, we can consider that it is composed of a set of rigid PCB board, connected via a set of flexible PCB board
+.
 ### Perimeter
 #### What is included?
-Cradle to gate
+This study aims at providing the cradle-to-gate environmental impact:
+  * Rigid bare PCBs.
-* Bare PCB
+  * Standard PCB specialization.
-  * Rigid
+  * With either 2 or multiple layers.
-  * Double-sided or multilayer
 #### What is excluded?
-* ICs on top of the PCB, without any electronic components on it
+This study exludes:
-* R&D activities to develop the PCB
+  * All electronics devices assembled on the bare PCB.
-* Input copper clad laminate process
+  * R&D activities to develop the PCB.
+  * The transition of the boards between manufacturing stages, which can be either manual or automated.
+  * The input copper clad laminate process impact.
+  * The end-of-production line multiple tests.
 ### Functional unit and reference flows
 #### What is the functional unit?
+The functional unit of this study is **"manufacture one squared-meter of rigid standard bare PCB"**.
 #### What are the reference flows?
+The reference flows are:
+  * The surface of substrate
+  * The surface of copper foil
+  * The weight of platted metal, both copper and surface finish ones