Printed circuit board - Revision history

Jnc: have articles on subtopics

2020-06-12T13:58:32Z

have articles on subtopics

Jnc: Mention 'etch'

2019-09-23T12:16:13Z

Mention 'etch'

Jnc: +cat

2018-12-14T18:57:43Z

+cat

Jnc: Proper cat

2018-10-20T16:25:43Z

Proper cat

Jnc: Most PCBs now surface-mount

2017-07-07T23:11:32Z

Most PCBs now surface-mount

Jnc: typo

2016-11-07T01:41:25Z

typo

Jnc: Stuby, but fills a need

2016-11-07T01:39:13Z

Stuby, but fills a need

New page

A '''printed circuit board''' (often abbreviated as [[PCB]]) is a technology used for cost-effective production of multiple instances of a module.

A thin fiberglass sheet has holes drilled in it, where the leads from components will be placed. It is then coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces.

The first PCB's were single or double-sided. Later, techniques for producing so-called 'multi-layered PCBs' were deveioped; a number of thin PCBs were created, and then glued together; this allowed the production of complex circuits which could not be 'routed' with only two surfaces.

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 A '''printed circuit board''' (often abbreviated as '''PCB''') is a technology used for cost-effective production of multiple instances of a module.
-A thin fiberglass sheet is coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of '''traces''' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the resist, leaving the traces. (The term for different revisions of a card, '''etches''', comes from this step.)
+A thin fiberglass sheet is coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of [[trace]]s which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name for the process.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the resist, leaving the traces. (The term for different revisions of a card, [[etch]]es, comes from this step.)
 The first PCB's were single or double-sided. Later, techniques for producing so-called 'multi-layered PCBs' were deveioped; a number of thin PCBs were created, and then glued together; this allowed the production of complex circuits which could not be 'routed' with only two surfaces.

@@ Line 1: / Line 1: @@
 A '''printed circuit board''' (often abbreviated as '''PCB''') is a technology used for cost-effective production of multiple instances of a module.
-A thin fiberglass sheet is coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces.
+A thin fiberglass sheet is coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of '''traces''' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the resist, leaving the traces. (The term for different revisions of a card, '''etches''', comes from this step.)
 The first PCB's were single or double-sided. Later, techniques for producing so-called 'multi-layered PCBs' were deveioped; a number of thin PCBs were created, and then glued together; this allowed the production of complex circuits which could not be 'routed' with only two surfaces.

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	When PCBs were first used, they had holes drilled in them, where the leads from components would be inserted. Most components are now designed to be surface-mounted, so the PCB layout has pads for them to be soldered to.		When PCBs were first used, they had holes drilled in them, where the leads from components would be inserted. Most components are now designed to be surface-mounted, so the PCB layout has pads for them to be soldered to.

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← Older revision		Revision as of 01:41, 7 November 2016
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−	A '''printed circuit board''' (often abbreviated as [[PCB]]) is a technology used for cost-effective production of multiple instances of a module.	+	A '''printed circuit board''' (often abbreviated as '''PCB''') is a technology used for cost-effective production of multiple instances of a module.

	A thin fiberglass sheet has holes drilled in it, where the leads from components will be placed. It is then coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces.		A thin fiberglass sheet has holes drilled in it, where the leads from components will be placed. It is then coated with a thin layer of copper; next, a pattern of 'resist' is applied, outlining a series of 'traces' which will connect together the components placed on the board. (This resist is usually printed on the board, hence the name.) The board is then placed in a chemical bath which dissolves the copper where it is not protected by the etch, leaving the traces.