I am trying to replace the keyboard on my 2019 Samsung Notebook 9 Pro. I had to pull off a layer of black tape on the old one to get it out. The tape was glued to the bottom of the keyboard, right above the motherboard. It ripped a little bit as I pulled it off and I can see that it looks metallic on the adhesive side.
What is this? An electrical insulator? Heat conductor? Do I need to replace it, and if so with what? I attached pictures of the old keyboard in process of trying to remove the tape, and the new one without the tape.
Edit: Here is a rough outline of where the layer was glued down. There were two pieces, the one on bottom is almost entirely pulled off in the pic, while the top one remains intact and glued to the keyboard.
Here is a picture of the keyboard area with the tape still applied, pulled from a parts supplier website: https://www.impactcomputers.com/image/cache/data/products/2/974577-800x800.jpg
My Pictures of Old and New Keyboard: