IPC-7351-2005_表面贴装焊盘布局设计和标准通用要求.pdf - 第85页

ANSI/IPC-T -50 T erms and Deﬁnitions for Interconnecting and Packaging Electronic Circuits Deﬁnition Submission/Approval Sheet The purpose of this form is to keep current with terms routinely used in the industry and the…

APPENDIX C

IPC-7351 Land Pattern Viewer

The IPC-7351 Land Pattern Viewer, hereafter referred to as

the IPC-7351 LP Viewer, is a shareware program that

allows users to view component and land pattern dimen-

sional data in tabular form as well as graphical images that

illustrate how a component is attached to the land pattern

on the board. The IPC-7351 LP Viewer is provided on a

CD-ROM that is included with the IPC-7351 standard.

Updated versions of the program, including dimensional

data for new component families, can be downloaded for

free from www.ipc.org under the ‘‘PCB Tools and Calcu-

lators’’ link.

C.1 Software Installation The IPC-7351 LP Viewer

comes on CD-ROM in a zipped ﬁle format. The zip ﬁle

contains important text ﬁles on the usage of the shareware

program as well as installation requirements. Microsoft

.NET Framework is required for the IPC-7351 LP Viewer

to run properly. If you have determined that you do not

have this component, the installation requirement text ﬁle

details how to obtain this software. Once you have con-

ﬁrmed that your system has Microsoft .NET Framework,

you can select the executable IPC-7351 LP Viewer ﬁle to

begin the installation process. See the Users Guide within

the IPC-7351 LP Viewer for detailed instructions on the

download of .NET Framework.

Note: A special ﬁle is required for the eventual build of

user preferences; this ﬁle has the extension [.dat]. The IPC-

7351 LP Viewer program installation does not initially

include a [.dat] ﬁle and therefore one is created automati-

cally the ﬁrst time you run the program. When starting the

program for the ﬁrst time, the User will be prompted by a

message that states a .DAT ﬁle does not exist and that one

is being created. A second message will be displayed con-

ﬁrming that the ﬁle has been created.

C.2 Software Usage Once installed, select the ‘‘Users

Guide’’ tool bar button located on the main interface screen

for the IPC-7351 LP Viewer. This .pdf document helps in

familiarizing the user with the Viewer by providing

detailed information on the following:

• Software Installation

• Setting up User Preferences

• Operating the Search Library Menu

• Updating Parts Library Files

C.3 Software Updates The IPC-7351 LP Viewer relies

on library ﬁles for component and land pattern dimensional

data. The extension for the library ﬁles is [.p]. These .p

ﬁles provide the raw dimensional data necessary for the

software to display components and land patterns in

graphical forum.

.p ﬁles also contain parts attributes. Attributes hold vital

statistical and descriptive data that every land pattern needs

so other users can quickly identify the component charac-

teristics. Attributes help organize data used to search for

existing library parts. Detailed descriptions of how to uti-

lize attributes can be found by selecting the ‘‘Users Guide’’

tool bar button located on the main interface screen for the

IPC-7351 LP Viewer.

As new component families are standardized by the indus-

try, new .p library ﬁles will be made available to users of

the IPC-7351 LP Viewer. These updated .p ﬁles can be

downloaded for free from www.ipc.org under the ‘‘PCB

Tools and Calculators’’ link.

C.4 Software Upgrades The IPC-7351 LP Viewer is a

shareware program that allows users to search and display

existing land patterns for standardized component families.

The Viewer is supported by additional software tools that

allow for the calculation of new land patterns as well as the

creation of new part libraries that stores new component

and land pattern data. Information on these enhanced soft-

ware tools is available at www.ipc.org under the ‘‘PCB

Tools and Calculators’’ link.

IPC-7351 February 2005

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ANSI/IPC-T-50 Terms and Deﬁnitions for

Interconnecting and Packaging Electronic Circuits

Deﬁnition Submission/Approval Sheet

The purpose of this form is to keep

current with terms routinely used in

the industry and their deﬁnitions.

Individuals or companies are

invited to comment. Please

complete this form and return to:

IPC

3000 Lakeside Drive, Suite 309S

Bannockburn, IL 60015-1219

Fax: 847 615.7105

SUBMITTOR INFORMATION:

Name:

Company:

City:

State/Zip:

Telephone:

Date:

❑ This is a NEW term and deﬁnition being submitted.

❑ This is an ADDITION to an existing term and deﬁnition(s).

❑ This is a CHANGE to an existing deﬁnition.

Term Deﬁnition

If space not adequate, use reverse side or attach additional sheet(s).

Artwork: ❑ Not Applicable ❑ Required ❑ To be supplied

❑ Included: Electronic File Name:

Document(s) to which this term applies:

Committees affected by this term:

Office Use

IPC Office Committee 2-30

Date Received:

Comments Collated:

Returned for Action:

Revision Inclusion:

Date of Initial Review:

Comment Resolution:

Committee Action: ❑ Accepted ❑ Rejected

❑ Accept Modify

IEC Classiﬁcation

Classiﬁcation Code • Serial Number

Terms and Deﬁnition Committee Final Approval Authorization:

Committee 2-30 has approved the above term for release in the next revision.

Name:

Committee: Date:

IPC 2-30

ASSOCIATION CONNECTING

ELECTRONICS INDUSTRIES

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