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Subject:	Re: IPC-A-600J, section 4.2.6 Core Bond to PTH hole wall
From:	Jose A Rios <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Jose A Rios <[log in to unmask]>
Date:	Wed, 14 Feb 2018 16:38:08 +0000
Content-Type:	text/plain
Parts/Attachments:	text/plain (1 lines)

Section 4.2 applies to metal core boards only (type 5 & 6 per 6012D 1.3.2), it does not apply to conventional multilayer boards. On metal core boards, IPSep is allowed on metal core layers other than copper, provided that it doesnt extend beyond 50% of the core layer thickness. If the metal core is copper, no IPSep is allowed. This is regardless of laminate type.





José (Joey) Ríos, Sr QA Engineer

Mission Assurance Manager

Kavli Institute for Astrophysics & Space Research

Massachusetts Institute of Technology

[log in to unmask]<mailto:[log in to unmask]>

(617)324-6272









On Feb 14, 2018, at 10:58 AM, [log in to unmask]<mailto:[log in to unmask]> wrote:



Fellow TechNetters:



   Can anyone out there provide a clarification to the above IPC Standard criteria.   Is any evidence of IPsep acceptable on LF FR4 laminates.   The presented photos and lingo is different from pervious revisions.



Victor,

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